FURVERT!

:d absurd_res ahoge animal_humanoid blonde_hair blush bottomless braided_hair breasts brown_hair cat_humanoid clothed clothing clothing_pull digital_media_(artwork) dog_days fangs felid felid_humanoid feline feline_humanoid female green_eyes hair hi_res humanoid jaune_clafoutis looking_at_viewer mammal mammal_humanoid multicolored_hair nipples open_clothing open_mouth open_shirt open_topwear panties panty_pull partially_clothed shaded shirt single_braid smile solo sweatband tail tateha teeth topwear two_tone_hair underwear underwear_pull white_clothing white_panties white_underwear

1:1 2012 ambiguous_penetration anal anal_penetration brown_hair cutie_mark double_penetration double_vaginal duo equid equine female feral forced fur green_eyes hair hasbro insect_wings lovingpony male mammal multicolored_hair multiple_penetration my_little_pony mythological_creature mythological_equine mythology oral oral_penetration pegasus penetration pink_hair quadruped quadruple_penetration rape sex signature simple_background tail tan_body tan_fur tentacle_in_mouth tentacle_penetration tentacle_rape tentacle_sex tentacles triple_penetration vaginal vaginal_penetration white_body white_fur white_hair wings

2013 3:4 anthro areola big_areola big_breasts black_lips black_nose breasts brown_body brown_fur brown_hair canid canine chest_tuft detailed digital_media_(artwork) erect_nipples eyelashes facial_piercing female fox fur grey_background hair hair_over_eye half-length_portrait huge_breasts leg_markings lip_piercing lip_ring lips looking_at_viewer mammal markings multicolored_body multicolored_fur naughty_face nipple_dip nipples nude one_eye_obstructed piercing playful portrait pose presenting puffy_areola ring_piercing short_hair simple_background smile socks_(marking) solo teal_eyes thefuckingdevil tuft two_tone_body two_tone_fur white_body white_fur yellow_body yellow_fur

2013 all_fours anal anal_penetration anthro anus backsack balls biceps big_balls big_muscles black_penis bodily_fluids brown_body brown_fur brown_hair canid canine canis chair cigar cum cum_in_ass cum_inside doggystyle domestic_dog duo erection eyes_closed fasttrack37d from_behind_position fur furniture genital_fluids genitals hair hotel husky looking_back lounge_chair male male/male male_penetrated male_penetrating male_penetrating_male mammal moan mounting muscular muscular_male nordic_sled_dog nude open_mouth orgasm outside penetration penis public public_sex sex smoking spitz swimming_pool tail tongue tongue_out water

2013 anthro barefoot bent_legs black_bars bodily_fluids breasts brown_hair calves_up clothing cum cum_in_mouth cum_inside duo erection eyewear faceless_character faceless_male feet fellatio female female_focus female_penetrated fully/fully_submerged fully_submerged genital_fluids genitals goggles hair hindpaw letterbox male male/female male_penetrating male_penetrating_female mammal mustelid nipples nude one-piece_swimsuit oral oral_penetration otter paws penetration penile penis raised_calf sex sex_in_water siroc sofeia solo_focus sport_swimsuit swimwear tail underwater underwater_sex water

2013 accipitrid accipitriform anthro asian_mythology avian beak bird black_border border breasts brown_hair claws dragon east_asian_mythology eastern_dragon egyptian_vulture eva_(ozawk) feathered_dragon feathered_scalie feathered_wings feathers female flying fur hair hi_res hybrid looking_at_viewer mythological_creature mythological_scalie mythology nipples non-mammal_breasts non-mammal_nipples nude old_world_vulture rotarr scalie solo tail vulture whiskers white_body white_feathers white_fur wings

3_toes 5_fingers anthro big_tail blue_eyes border boxers_(clothing) brown_hair clothing domestic_cat feet felid feline felis fingers fur grey_body grey_fur grin hair heart_boxers heart_clothing heart_pattern heart_pattern_underwear heart_symbol heart_underwear long_tail looking_at_viewer male mammal navel nipples pattern_clothing pattern_underwear pink_nose signature simple_background sitting sleza-aka-michiko smile solo stripes tail toes underwear white_border white_clothing white_underwear white_with_red_hearts_underwear

2011 black_markings black_penis border brown_hair character_name claws color_swatch dragon electricity english_text expressions flaccid genitals hair horn male markings membrane_(anatomy) membranous_wings model_sheet mythological_creature mythological_scalie mythology nude penis red_border ribbed_penis scalie shalone_howard_(sk) solo tail text tyro_thunderdrone wings yellow_body yellow_skin

2013 4_toes anthro balls black_body black_fur black_nose bodily_fluids breasts brown_body brown_fur brown_hair claws clothing cum cum_in_vagina cum_inside duo erection eyes_closed feet female female_penetrated footwear fur furniture genital_fluids genitals hair high_heels hindpaw inside licking living_room lying male male/female male_penetrating male_penetrating_female mammal nipples nude on_back open_mouth paws penetration penile penile_penetration penis penis_in_vagina plantigrade platform_footwear platform_heels red_eyes red_hair sex shoes short_hair sofa spots tail toes tongue tongue_out unknown_species vagabondbastard vaginal vaginal_penetration vulva

3:1 anthro archie_comics aval0nx black_hair blue_eyes bra brown_body brown_fur brown_hair chipmunk clothed clothing female fur ground_squirrel hair hi_res mammal navel panties red_hair rodent sally_acorn sciurid sega smile solo sonic_the_hedgehog_(archie) sonic_the_hedgehog_(comics) sonic_the_hedgehog_(series) underwear

anthro bed bedding bed_sheet biped brown_body brown_fur brown_hair choco_bunny eyes_closed female fur furniture hair lagomorph leporid lying mammal nude on_bed pillow rabbit sleeping solo terdburgler under_covers

animal_humanoid bare_legs barefoot bikini blue_eyes breasts brown_hair cat_humanoid cleavage clothed clothing feet felid felid_humanoid feline feline_humanoid female furniture hair hi_res hooded_jacket humanoid looking_at_viewer mammal mammal_humanoid miyamae_porin navel reclining short_hair side-tie_bikini side-tie_clothing side-tie_swimwear signature simple_background skimpy sofa solo string_bikini swimwear tail triangle_bikini two-piece_swimsuit white_background

anthro brown_hair bust_portrait casual_nudity chest_tuft colored conditional_dnp countershading felid female flora_(twokinds) fur hair keidran looking_at_viewer mammal nude orange_body orange_fur pantherine portrait smile solo stripes tiger tom_fischbach tuft twokinds white_body white_fur

2011 4:5 abs anthro balls barely_visible_balls barely_visible_genitalia barely_visible_penis biceps biped brown_body brown_fur brown_hair casual_nudity claws eclipticafusion flaccid foreskin fur genitals green_eyes hair male mammal muscular muscular_anthro muscular_male mustelid nude otter pecs penis pose sad shower shower_head soap solo tail toe_claws water wet whiskers

2013 akitaka anthro blush breasts brown_body brown_eyes brown_fur brown_hair clothing equid equine eyewear female fur glasses hair horse kemono long_hair mammal solo tail

abs anthro antlers armpit_hair balls biceps body_hair bovid bovine brown_body brown_fur brown_hair cattle clothing dasher_whitetail deer equid equine erection eyes_closed flexing foreskin frottage fur genitals gingertail grey_body grey_fur group group_sex hair handjob hands_behind_head hooves horn horse humanoid_genitalia humanoid_penis interspecies lying male male/male mammal muscular nipples nude partially_retracted_foreskin pecs penile penis penis_grab penises_touching retracted_foreskin sex sitting surprised tail thick_penis threesome trio underwear

abs angry anthro armpit_hair arthropod_webbing bdsm biceps biped bodily_fluids body_hair bondage bound brown_body brown_fur brown_hair brown_tail bulge clothed clothing equid equine eyes_closed flexing fur gingertail hair horse male mammal muscular muscular_anthro muscular_male nipples pecs solo speedo spider_web standing submissive submissive_male sweat swimwear tail thong topless underwear

2013 abs ace_stryker anal anal_penetration anthro balls biceps black_hair blue_eyes brown_hair canid canine canis dipstick_tail ear_piercing elf erection eyes_closed facial_hair fantasy fellatio fox from_behind_position genitals group group_sex hair hand_on_head handjob hi_res humanoid humanoid_pointy_ears jewelry long_hair lucky_pierre male male/male male_penetrated male_penetrating male_penetrating_male mammal markings medieval mixed_sandwich_position muscular necklace nipples nude oral oral_penetration pecs pendant penetration penile penile_penetration penis penis_grab penis_in_ass piercing pointy_ears pubes ring sandwich_position sex sucked_and_plowed tail tail_markings tattoo threesome tongue tongue_out tongue_out_fellatio trio wolf yellow_eyes

2013 4_toes 5_fingers ahegao ammy amwulf anal anal_orgasm anal_penetration anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro balls bed bent_legs biceps big_muscles big_penis blonde_hair blue_body blue_eyes blue_fur blush bodily_fluids border brown_body brown_fur brown_hair calendar canid canine canis claws cum cum_on_penis cum_while_penetrated cumshot curled_tail domestic_dog duo ejaculation empty_eyes erection eyewear facial_piercing fangs feet fingers foot_fetish foot_lick foot_play fur furniture genital_fluids genitals glasses hair hand_on_leg hands-free hi_res humanoid_genitalia humanoid_hands humanoid_penis husky knocker_piercing lavshep leaking leg_grab licking licking_another licking_partner looking_pleasured lying male male/male male_penetrated male_penetrating male_penetrating_male mammal multiple_piercings muscular muscular_male nipple_piercing nipple_ring nipples nordic_sled_dog nose_piercing nose_ring nude obscured_penetration on_back on_one_leg orgasm pawpads paws pecs penetration penile penile_penetration penis penis_in_ass piercing platform_scissor_position platform_sex purple_body purple_fur raised_hips ring ring_piercing saliva septum_piercing sex spitz standing standing_sex table_lotus_position tail teeth toe_claws toes tongue tongue_out twisted_sex white_body white_border white_fur wolf yellow_body yellow_fur yellow_nipples

anthro boulevard brown_body brown_fur brown_hair chest_tuft clothing ear_piercing felid fur hair lion male mammal mane muscular muscular_anthro muscular_male pantherine piercing smile solo tail tail_tuft tuft

anthro antlers black_nose brown_body brown_fur brown_hair clothed clothing cross deer fur hair hi_res horn jägermeister licking licking_lips licking_own_lips looking_at_viewer male mammal self_lick smile solo tongue tongue_out topless zenthetiger

all_fours anthro black_hair boots boulevard breasts brown_eyes brown_hair clothed clothing ear_piercing felid female footwear fur gloves grey_body grey_fur hair handwear hanging_breasts latex lion looking_at_viewer mammal muscular muscular_anthro muscular_female nipples pantherine piercing raised_tail rochelle_barnette shoes smile solo tail thong topless underwear

2012 black_background blizzard_entertainment brown_hair copyright_symbol draenei empty_eyes female hair hi_res humanoid priest runicnature shadow side_view simple_background solo symbol warcraft year

6:5 abby_sinian anthro big_breasts bodily_fluids boot_licking boots bottomwear breasts brown_body brown_fur brown_hair carelessdoodler cleavage clothed clothing domestic_cat dominatrix duo eyes_closed feet felid feline felis female foot_fetish foot_lick foot_play footjob footwear fur genital_fluids gloves hair handwear hanna-barbera heart_symbol high_heeled_boots high_heels legwear licking licking_boots lipstick makeup mammal navel orange_body orange_fur platform_footwear platform_heels riding_crop saliva sex shoes skirt swat_kats tail tattoo teeth thigh_highs tongue tongue_out turmoil_(swat_kats) under_boob vaginal vaginal_fluids vaginal_footjob wet whip

2013 3d_(artwork) 3d_animation abigail_roo animated annabelle_cow anthroanim areola big_areola big_breasts big_nipples blonde_hair bodily_fluids bottomwear bovid bovine breast_squish breasts brown_body brown_fur brown_hair clothed clothing cowbell digital_media_(artwork) duo female flash fur hair heart_symbol high-angle_view huge_breasts huge_nipples hyper hyper_breasts jumping kangaroo lactating macropod mammal markings marsupial milk multicolored_body multicolored_fur nipples no_sound nude puffy_areola shorts sitting squish thick_thighs topless trampoline two_tone_body two_tone_fur what wide_hips

2013 6:5 anthro anthrofied arcanine bdsm black_nose blue_eyes blush bound breasts brown_body brown_fur brown_hair canid canine claws cleavage clothed clothing collar corset cuff_(restraint) digital_media_(artwork) dominant dominant_female duo feet female fluffy fluffy_tail fur generation_1_pokemon gradient_background hair hindpaw leash lingerie looking_at_viewer lying male mammal multi_tail muzzle_(object) muzzled navel nintendo on_front onnanoko orange_body orange_fur panties pawpads paws petplay pokemon pokemon_(species) pokemorph puppyplay restraints roleplay shackles shaded short_hair simple_background skimpy slightly_chubby smile standing submissive submissive_male tail thick_thighs topless topwear underwear vulpix white_body white_fur

2013 4_toes adeola_oshodi anthro barefoot big_breasts big_butt biped black_claws black_lips black_nose breasts brown_hair butt claws curling_toes curvy_figure feet female flexible foot_focus fur genitals hair hindpaw huge_butt humanoid_feet hyena leg_markings lips long_hair looking_at_viewer mammal markings mechogama nipples nude orange_eyes pawpads paws plantigrade presenting presenting_hindquarters pubes raised_tail rear_view simple_background sketch smile socks_(marking) soles solo spots spotted_hyena tail tan_body tan_fur teeth toe_claws toes voluptuous vulva wide_hips

anarchy_symbol anarki anthro anthro_on_anthro army_star balls bdsm black_hair blood blue_body blue_fur bodily_fluids bondage bound breasts brown_hair canid canine canis chaoz chaozwolfess collar cum cum_in_vagina cum_inside duo english_text erection eyes_closed feet female female_penetrated fur genital_fluids genitals grey_body grey_fur hair hindpaw leash long_hair male male/female male_penetrating male_penetrating_female mammal neon_green orange_body orange_fur orgasm paws penetration penile penile_penetration penis penis_in_vagina pink_body pink_fur ribbons saliva scratches sex text vaginal vaginal_penetration wolf

2013 animal_genitalia animal_penis anthro anthro_on_anthro balls biceps big_breasts big_penis black_body black_fur black_nose blue_eyes blue_hair bodily_fluids breasts brown_hair canid canine canine_genitalia canine_penis canis cum cum_in_vagina cum_inside digital_media_(artwork) domestic_cat duo erection eyes_closed felid feline felis female female_on_top female_penetrated fur genital_fluids genitals hair interspecies jailbird jasmine_lovelace knot male male/female male_on_bottom male_penetrating male_penetrating_female mammal muscular nipples nude on_bottom on_top orgasm pecs penetration penile penile_penetration penis penis_in_vagina reverse_cowgirl_position sex shaded smile spread_legs spreading tail vaginal vaginal_penetration vulva white_body white_fur wolf yamato_iouko yamatoiouko

2013 4_toes anthro anthro_on_anthro breasts brown_hair canid canine canis clitoris cowgirl_position duo equid equine erection eyes_closed feet female female_on_top female_penetrated from_front_position fur genitals grey_body grey_fur hair hindpaw horse kissing male male/female male_on_bottom male_penetrating male_penetrating_female mammal nude on_bottom on_top paws penetration penile penile_penetration penis penis_in_vagina sex skidd spread_legs spreading straddling tail tan_body tan_fur thick_penis toes vaginal vaginal_penetration vulva white_hair wolf

2013 anthro biped blue_penis brown_background brown_body brown_eyes brown_hair brown_skin digital_media_(artwork) dorian_(nightfaux) felid flaccid foreskin genitals hair hands_behind_head hi_res humanoid_genitalia humanoid_penis lion long_hair looking_at_viewer male mammal muscular muscular_anthro muscular_male navel nightfaux pantherine penis pink_nose pose simple_background smile solo standing tail vein

2013 anal anal_fingering anal_penetration anthro anthro_on_anthro anus blind blue_eyes blush bodily_fluids brown_hair butt clitoris cunnilingus cybernetics cyborg digital_media_(artwork) disability duo ellie_(nightfaux) female female/female fingering fingering_partner genitals grey_body grey_skin hair hi_res licking looking_down lying machine mammal mouse murid murine nightfaux on_back oral penetration pink_nose rodent saliva sex short_hair smile tail tongue tongue_out vaginal vulva

2013 animal_genitalia animal_penis anthro anthro_on_anthro arms_tied balls bdsm bedroom_eyes biped bite biting_lip biting_own_lip black_nose bondage bottomless bound brown_body brown_fur brown_hair canid canine canine_genitalia canine_penis canis chest_tuft clothed clothing creepy_face cross cross_necklace domestic_dog dominant dominant_male duo ear_piercing erection eye_contact fluffy fur genitals green_eyes hair half-closed_eyes hands_behind_back holding_penis jewelry kneeling knot larger_male lips looking_at_another looking_at_partner male male/male mammal narrowed_eyes necklace nude partially_clothed penis penis_tip piercing pink_penis seductive self_bite sheath shirt side_view size_difference smaller_male submissive submissive_male syynx tail teeth topwear tuft yellow_eyes

accessory amniotic_fluid amniotic_sac anatomically_correct anatomically_correct_genitalia anatomically_correct_vulva animal_genitalia animal_vulva belly big_belly birth blue_eyes bodily_fluids brown_body brown_fur brown_hair cloud cutie_mark digital_media_(artwork) earth_pony equid equine equine_genitalia equine_vulva fan_character female feral flower flower_in_hair foaling fur genital_fluids genitals grass hair hair_accessory hasbro horse live_birth mammal my_little_pony outside plant pony pregnant pregnant_female presenting quadruped raindancer raindrop sky smudge_proof solo sweat tail vaginal_birth vulva

2013 anthro anus bed biped brown_hair butt clock feet felid female furniture genitals hair heart_symbol hi_res hindpaw inside legs_together legs_up lion long_hair looking_at_viewer lying mammal nude on_back on_bed pandora_(shinneko) pantherine pawpads paws purple_eyes shinneko smile solo spread_butt spreading stretching tail tail_tuft tongue tongue_out tuft vulva

2013 anthro biped breasts brown_hair featureless_breasts featureless_crotch felid female flower fur grass hair lying mammal nude on_back orange_body orange_fur outside pantherine plant silentravyn solo stripes tail tiger traditional_media_(artwork)

1:1 2013 anal anal_penetration animal_genitalia animal_penis anthro anus balls bed black_penis blondefoxy blue_eyes blue_hair blue_penis blush bodily_fluids brown_hair butt canid canine canine_genitalia canine_penis claws cum cum_in_ass cum_inside digital_drawing_(artwork) digital_media_(artwork) digitigrade dipstick_tail equid equine_genitalia equine_penis erection felid from_behind_position fur furniture genital_fluids genitals grey_body grey_fur group group_sex hair hybrid interspecies knot lube lying male male/male male_penetrated male_penetrating male_penetrating_male mammal markings nude on_side pawpads paws penetration penis perineum raised_leg red_penis sex shallow_penetration spread_butt spread_legs spreading tail tail_markings tan_body tan_fur threesome train_position trio

2012 :o ahoge animal_humanoid blush breasts brown_hair cleavage clothed clothing collared_shirt digital_media_(artwork) dress_shirt female hair half-length_portrait humanoid inner_ear_fluff long_hair looking_at_viewer mammal open_clothing open_mouth open_shirt open_topwear partially_clothed pink_eyes portrait shirt simple_background solo stretching topwear tsliuyixin tuft waking_up white_background

2012 anthro anthro_on_anthro balls black_nose bodily_fluids brown_hair buyo_(artist) canid canid_demon canine canis clothing consentacles crotch_tentacles cum demon domestic_dog duo erection eyes_closed eyewear frottage fur genital_fluids genitals glasses hair hat headgear headwear hellhound hellhound_(lapfox_trax) horn lapfox_trax long_tongue male male/male male_penetrated male_penetrating male_penetrating_male mammal mythological_canine mythological_creature mythology nude open_mouth oral penetration penile penis penises_touching penisjob prehensile_penis sex tail tail_tuft tentacles tongue tongue_out tonguejob truxton_dogyuun tuft

2013 abs anthro anthro_on_anthro beard black_hair blizzard_entertainment blue_eyes blush bodily_fluids bovid bovine breasts brown_body brown_fur brown_hair butt clitoris duo erection eye_contact facial_hair female female_penetrated from_front_position fur genital_fluids genitals grass grey_body grey_fur grezzga hair happy happy_sex horn iggi looking_at_another lying male male/female male_penetrating male_penetrating_female mammal marhawa missionary_position muscular nipples nude on_back orgasm penetration penile penile_penetration penis penis_in_vagina plant pubes romantic romantic_ambiance romantic_couple sex spread_legs spreading tail tauren tent vaginal vaginal_fluids vaginal_penetration vulva warcraft yellow_eyes

2010 3_toes :| black_hair black_nose blank_stare brown_hair comic constricted_pupils domestic_cat dot_eyes duo english_text featureless_crotch feet felid feline felis femboy flop freehaven_(character) fur grey_body grey_fur hair hi_res hindpaw hybrid jumping lagomorph leporid looking_at_another lying male mammal nude on_side overreaction pawpads paws pink_pawpads poking pupils purple_eyes rabbit semi-anthro simple_background simple_eyes small_pupils sound_effects standing stare taski taski_(character) text toes what white_background wide_eyed

2013 abstract_background anthro big_breasts big_butt biped black_nose blush breasts brown_body brown_fur brown_hair butt canid canine curvy_figure digital_media_(artwork) eyewear female fox fur genitals glasses green_eyes hair hi_res long_hair looking_at_viewer looking_back mammal nipples nude presenting presenting_hindquarters rear_view shari_(tiger1001) simple_background sitting slightly_chubby smile solo tail tiger1001 vulva white_body white_fur wide_hips yellow_body yellow_fur

anonipony anthro anus biped bodily_fluids brown_body brown_fur brown_hair butt canid canine canis domestic_dog female fingering fingering_self fur genital_fluids genitals hair inviting jobo37 long_hair looking_at_viewer looking_back mammal masturbation nude presenting presenting_hindquarters rear_view solo tail vaginal vaginal_fingering vaginal_fluids vaginal_masturbation vulva

2013 4:5 anal anal_masturbation anal_penetration anthro anus biped breasts brown_hair dildo domestic_cat felid feline felis female fingering fingering_self fur genitals hair hi_res kittentits mammal masturbation nipples nude orgasm penetration sex_toy solo tail toying_self vaginal vaginal_fingering vaginal_masturbation vulva white_body white_fur yellow_eyes

4:3 accessory alternative_fashion bow_(feature) bow_accessory bow_ribbon brown_hair clothing dress female frilly generation_2_pokemon generation_3_pokemon green_hair group hair hair_accessory hair_bow hair_mouth hair_ribbon hime_lolita humanoid j-fashion kirlia lolita_(fashion) mawile misdreavus nintendo pokemoa pokemon pokemon_(species) red_eyes ribbons shiro_lolita spirit teal_body teal_hair teal_skin veil wedding_dress wedding_veil white_body white_skin yellow_sclera

angry blonde_hair blue_eyes blush bodily_fluids brown_hair dialogue elf english_text female fingering genital_fluids genitals goldcoinsuperstar group hair humanoid link long_hair male male/female midna_(true_form) nintendo not_furry nude orange_hair penetration princess_zelda profanity red_eyes sex smile text the_legend_of_zelda twili twilight_princess vaginal vaginal_fluids vaginal_penetration vulva

2013 abs angel angry anthro breasts brown_hair canid canine feathered_wings feathers female fist genitals hair halo hi_res mammal markings muscular muscular_anthro muscular_female nipples nude obaum solo star tail tattoo vulva wings

amber_eyes anthro areola big_breasts biped blush breasts brown_hair chest_tuft claws fat_upper_pubic_area felid female fur hair hand_on_hip kemono kishibe lion looking_at_viewer mammal mane mane_hair mismatched_sexual_dimorphism nipples nude open_mouth overweight overweight_anthro overweight_female pantherine slightly_chubby smile solo standing tail tuft yellow_body yellow_fur

accessory amniotic_fluid amniotic_sac anatomically_correct anatomically_correct_genitalia anatomically_correct_vulva animal_genitalia animal_vulva belly big_belly birth blue_eyes bodily_fluids brown_body brown_fur brown_hair cutie_mark digital_media_(artwork) earth_pony equid equine equine_genitalia equine_vulva fan_character female feral flower flower_in_hair foaling fur genital_fluids genitals grass hair hair_accessory hasbro horse live_birth mammal my_little_pony outside plant pony pregnant pregnant_female presenting quadruped raindancer raindrop smudge_proof solo sweat tail vaginal_birth vulva