FURVERT!

2012 4:3 alpha_channel alternate_species ambiguous_gender anatid anseriform avian bird cape chicken clothing crown digital_drawing_(artwork) digital_media_(artwork) domestic_cat duck duo felid feline felis feral fur furrification galliform headgear hetalia hi_res looking_at_viewer mammal ninetail-fox notched_ear phasianid pillow prussia_(hetalia) red_eyes royalty scar shaded simple_background smile smirk soft_shading transparent_background white_body white_fur

2013 bathtub child dialogue english_text equid equine female feral friendship_is_magic fur green_eyes hair hasbro hi_res horn inside jananimations mammal mirror multicolored_hair my_little_pony mythological_creature mythological_equine mythology rubber_duck sink solo sweetie_belle_(mlp) text tumblr two_tone_hair unicorn water wet white_body white_fur window young young_feral

abs accessory anatid anseriform anthro avian beak biceps big_breasts bird blonde_hair breasts disney duck erect_nipples eyewear female genitals glasses hair headband lordstevie mighty_ducks muscular muscular_anthro muscular_female nipples non-mammal_breasts non-mammal_nipples nude pubes simple_background smile solo tanya_vanderflock vulva white_background

2013 absurd_res bathing bathtub blush brush earth_pony equid equine eyes_closed female feral friendship_is_magic fur genitals hair hasbro hi_res horse mammal my_little_pony partially_submerged pink_body pink_fur pink_hair pinkie_pie_(mlp) pony rubber_duck solo template93 vulva water wet

2013 against_fence against_surface anatid anseriform applejack_(mlp) avian bird blonde_hair blue_hair duck earth_pony english_text equid equine feathered_wings feathers female fence feral firefly_(pre-g4) fluttershy_(mlp) flying freckles friendship_is_magic graystripe64 green_eyes group hair hasbro hi_res horse mammal multiple_images my_little_pony mythological_creature mythological_equine mythology night pegasus pink_hair pond pony purple_eyes shooting_star solo star swimming text water wings yellow_body yellow_feathers young young_feral

ambiguous_gender anatid anseriform anthro aquatic avian bird casual_nudity collar countershading digital_media_(artwork) duck dunkleosteus duo female_(lore) feral fish floating hi_res hybrid inflatable lucky_duck lying mammal mikhaila_kirov mustelid nipples nude on_back otter outside placoderm pool_toy prehistoric_species shaded simple_background smile swim_ring tsampikos water waterscape

abs anatid anseriform anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro areola avian beak big_breasts bird bouncing_breasts breasts cape clothed clothed_sex clothing clothing_around_one_leg daisy_duck detailed_background disney donald_duck duck duck_of_doom duo erect_nipples female female_penetrated fire_hydrant from_front_position front-print_panties grin heart_clothing heart_panties heart_print heart_print_panties heart_print_underwear heart_symbol heart_underwear horn latex looking_pleasured lordstevie lying male male/female male_penetrating male_penetrating_female news nipples non-mammal_breasts non-mammal_nipples obscured_penetration on_back on_vehicle outside panties panties_around_one_leg panties_down partially_clothed penetration penile penile_penetration penis_in_vagina pink_clothing pink_panties pink_underwear platform_sex print_clothing print_panties print_underwear quack_pack reporter sex smile spread_arms spread_legs spreading standing standing_sex table_lotus_position topless underwear underwear_around_one_leg underwear_down vaginal vaginal_penetration

anatid anseriform anthro areola avian beak big_breasts bird blue_eyes blush breasts daisy_duck disney duck erect_nipples female hair huge_breasts jojocoso looking_at_viewer nipples non-mammal_breasts non-mammal_nipples nude simple_background smile solo white_background

8-bit-britt anatid anseriform anthro avian beak bird black_body black_feathers blush bugs_bunny daffy_duck duck duo feathers hi_res lagomorph leporid looney_tunes male male/male mammal nude rabbit romantic romantic_couple toony warner_brothers yellow_beak

2013 abs alien alien_humanoid arachnid armor arthropod axe big_breasts black_body black_skin blue_eyes bodily_fluids bone bottomwear breasts cleavage clothed clothing collar demon duck_dodgers dungeon ear_piercing female fire glowing glowing_eyes grandfathered_content group hair headgear helmet horn humanoid insect jewelry loincloth long_hair looney_tunes lordstevie male martian marvin_the_martian melee_weapon monster muscular muscular_female navel not_furry piercing polearm queen_tyr'ahnee red_eyes scared skimpy skull spider staff sweat torch warner_brothers weapon white_hair

accessory anatid anseriform anthro avian balls bird bodily_fluids bow_(feature) bow_accessory bow_ribbon clothing cum duck duo erection female from_behind_position genital_fluids genitals hair_accessory hair_bow hair_ribbon half-closed_eyes jk loon male male/female narrowed_eyes penis plucky_duck ribbons sex shirley_the_loon shirt tank_top tiny_toon_adventures topwear warner_brothers

2013 alpha_channel anatid anseriform anthro areola avian beak big_breasts biped bird bodily_fluids breasts digital_media_(artwork) duck elpatrixf erect_nipples female generation_1_pokemon genitals grass hi_res nintendo nipple_dip nipples non-mammal_breasts non-mammal_nipples pink_nipples plant pokemon pokemon_(species) pokemorph psyduck simple_background sitting slightly_chubby solo tears transparent_background vulva water

2013 anas anatid angry animal_crossing anseriform anthro avian awkwardzombie bird clenched_teeth comic crossed_arms dabbling_duck domestic_cat duck english_text eye_bags felid feline felis female grandfathered_content human katie_tiedrich katie_tiedrich_(persona) looking_at_another mallard mammal molly_(animal_crossing) nintendo question rover_(animal_crossing) sitting talking_to_another teeth text three_frame_image train url vehicle villager_(animal_crossing)

anatid anseriform anthro avian beak bear bent_over bird dolan duck duo female interspecies male male/female mammal meme nipples non-mammal_nipples sex spurdo unknown_artist what

2013 anas anatid anseriform avian bird blue_eyes blush bodily_fluids brown_body brown_fur brown_hair controller cream_heart crossover cursor cutie_mark da_goddamn_batguy dabbling_duck duck duck_hunt duck_hunt_duck earth_pony electronics english_text equid equine fan_character female feral fur game_controller gaming genital_fluids hair hasbro horse improvised_dildo improvised_sex_toy inside looking_back mallard mammal masturbation mature_female mature_feral moan multitasking my_little_pony navel nintendo one_eye_closed penetration playing_video_game pony smile solo teeth television text vaginal vaginal_fluids vaginal_masturbation wii wink yelling

alien alien_humanoid armor big_breasts black_body black_skin blue_eyes breasts camel_toe cleavage clothed clothing convincing_weapon duck_dodgers female grandfathered_content gun hair heavy_metal heavy_metal_2000 humanoid julie_strain long_hair lordstevie martian melee_weapon navel nipple_outline not_furry outside queen_tyr'ahnee ranged_weapon skimpy solo sword unconvincing_armor warner_brothers weapon white_hair

anatid animal_crossing anseriform anthro avian beak bird duck female heart_symbol lacgl molly_(animal_crossing) monochrome nintendo requestfaeg solo

aintsmart animal_crossing anthro breasts broom cleaning_tool cleavage clothed clothing cosplay crossover disney donald_duck eulipotyphlan eyeshadow fake_horns female freckles gracie_(animal_crossing) group halloween hedgehog holidays label_able legwear mabel_able makeup mammal nintendo sable_able sibling_(lore) sister_(lore) sisters_(lore) stockings witch_costume

1:1 3_toes annoyed anthro barefoot bath bathtub big_breasts biped blinds breasts bubble cactus claws clothing conditional_dnp digit_ring digital_media_(artwork) dinosaur facial_piercing feet female foot_focus hat headgear headwear hindpaw huge_breasts humanoid_feet japanese_text jewelry lightened_soles lip_piercing nipples non-mammal_breasts non-mammal_nipples nude pamela_rex_(zp92) paws photo picture_frame piercing plant plantigrade prehistoric_species red_eyes reptile ring rubber_duck saurischian scalie sharp_teeth soles solo tail tattoo teeth text theropod toe_claws toe_ring toes tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex water window wrinkled_feet wrinkles zp92

ambiguous_gender anatid animated animated_gif anseriform avian beak bird black_eyes black_hair duck duo feathers female frown fur genitals hair human humor looking_at_viewer low_res mammal navel nude open_mouth orange_body orange_skin pubes short_hair short_playtime standing stare tan_body tan_skin tongue toony unknown_artist vulva

2012 anatid anseriform avian bird blue_eyes detailed_background duck equid equine feathered_wings feathers female feral fluttershy_(mlp) friendship_is_magic fur group hair harwick hasbro hi_res long_hair mammal my_little_pony mythological_creature mythological_equine mythology nature outside partially_submerged pegasus pink_hair water wet wings yellow_body yellow_feathers yellow_fur

2013 all_fours ambiguous_penetration anal anal_penetration anatid anseriform anthro areola avian beak big_breasts big_butt bird black_body black_fur black_hair black_nipples blue_body blue_fur blue_nipples blush bodily_fluids breasts butt canid canine canis clothing digital_media_(artwork) dildo drooling duck english_text erica_kelley eyes_closed female female/female fur gangbang genital_fluids green_body green_fur group group_sex gwen_travers hair hanging_breasts learning_curves liv_kerwin looking_back mammal mature_anthro mature_female max_blackrabbit multicolored_hair nipples non-mammal_breasts non-mammal_nipples open_mouth orange_eyes orgasm penetration pounding_ass rape_face raven_hunt saliva sex sex_toy sharp_teeth smile splash strapon teacher teeth text thrusting tongue tongue_out two_tone_hair vaginal_fluids water wet white_body white_fur wolf yellow_eyes

1:1 2013 4_toes 5_fingers abs anthro athletic biceps big_muscles biped bird_dog bottomwear brown_body brown_eyes brown_fur bulge canid canine canis claws clothed clothing collar detailed detailed_background digital_media_(artwork) domestic_dog eyewear feet fingers fur glasses grin hi_res hunting_dog linlvjia male mammal muscular muscular_anthro muscular_male navel nipples nova_scotia_duck_tolling_retriever orange_body orange_eyes orange_fur outside pawpads paws pecs pink_nipples pink_nose pose raised_leg randalwuff retriever rock sea shorts sitting sky smile solo summer toe_claws toes topless water white_body white_fur

anal anal_penetration anatid anseriform anthro avian ayvee bed bird bugs_bunny clothing daffy_duck duck duo faceless_character faceless_male from_behind_position furniture gloves handwear lagomorph leporid looney_tunes male male/male male_penetrated male_penetrating male_penetrating_male mammal nude obscured_penetration obscured_sex penetration rabbit sex warner_brothers

anatid anseriform anthro avian ayvee bird bugs_bunny butt butt_grab clothing comic daffy_duck duck duo gloves hand_on_butt handwear hi_res kissing lagomorph leporid looney_tunes male male/male mammal rabbit sex warner_brothers

2013 alpha_channel amber_eyes blonde_hair brown_body brown_eyes brown_feathers brown_hair clothing cutie_mark derpy_hooves_(mlp) duo equid equine feathered_wings feathers female feral first_aid_kit footwear friendship_is_magic fur goatanimedatingsim grey_body grey_feathers grey_fur hair hasbro hi_res mammal medical_instrument my_little_pony mythological_creature mythological_equine mythology pegasus quad_skates roller_skates rubber_duck scientific_instrument simple_background skating transparent_background wild_fire_(mlp) wings yellow_body yellow_eyes yellow_feathers

2013 5:4 animal_genitalia animal_penis anthro anthrofied balls big_balls big_breasts big_penis bite biting_lip biting_own_lip breast_play breast_squish breasts breasts_frottage butt butt_grab collaborative collaborative_sex collaborative_titfuck diamond_tiara_(mlp) earth_pony equid equine equine_genitalia equine_penis erection eyes_closed female friendship_is_magic genitals group group_sex hand_on_butt hasbro hi_res horn horse huge_penis interspecies licking lips looking_up male male/female mammal my_little_pony mythological_creature mythological_equine mythology nipples nude open_mouth penis pony purevil rubber_duck self_bite sex silver_spoon_(mlp) snips_(mlp) squish standing teamwork teeth threesome titfuck tongue tongue_out trio unicorn water

anthro anvil_position bird_dog bisexual bodily_fluids bracelet canid canine canis clothing collar cum cumshot digit_ring digital_drawing_(artwork) digital_media_(artwork) domestic_dog ejaculation erection eyewear feet female foursome from_front_position genital_fluids genitals glasses group group_sex hindpaw holding_knot holding_own_knot holding_own_penis holding_penis hunting_dog husky jacki_northstar jewelry kannos knot legs_up line_art male male/female male/male mammal masturbation monochrome nipple_piercing nipples nordic_sled_dog nova_scotia_duck_tolling_retriever nude orgasm pawpads paws penetration penile penile_masturbation penis piercing raised_tail randalwuff retriever ring sex shirt spitz tail toe_ring toes topwear vaginal vaginal_penetration wolf

2013 3:4 alien alien_humanoid areola barefoot big_breasts big_nipples black_body black_skin bound breasts captured chain duck_dodgers english_text erect_nipples feet female genitals grandfathered_content hair huge_breasts humanoid long_hair looking_at_viewer martian nipples not_furry nude pink_nipples purple_eyes queen_tyr'ahnee simple_background solo standing submissive submissive_female text ultrafem url vulva warner_brothers white_background white_hair

alternate_species ambiguous_gender anatid anseriform avian bird bodily_fluids derp_eyes drooling duck fakemon feral fusion generation_1_pokemon hybrid kendall_hale looking_at_viewer nidoking nightmare_fuel nintendo open_mouth pokemon pokemon_(species) pokemon_fusion psyduck saliva sharp_teeth simple_background solo teeth tongue what_has_science_done white_background

2011 4_fingers 8-bit-britt absurd_res anatid anseriform anthro avian biped bird black_body black_fur blush bugs_bunny daffy_duck duck duo eyes_closed fingers fur grey_body grey_fur hi_res holding_chin kiss_on_lips kissing lagomorph leporid looney_tunes male male/male mammal nude rabbit simple_background surprise_kiss toony traditional_media_(artwork) warner_brothers white_background

2013 accessory anatid angel_(mlp) anseriform apple_bloom_(mlp) avian beak bird bow_(feature) bow_accessory bow_ribbon cloud cutie_mark cutie_mark_crusaders_(mlp) duck earth_pony equid equine exclamation_point eyes_closed feathered_wings feathers female feral fluttershy_(mlp) friendship_is_magic fur group hair hair_accessory hair_bow hair_ribbon hasbro heart_symbol horn horse lagomorph leporid long_hair looking_back male mammal multicolored_hair my_little_pony mythological_creature mythological_equine mythology orange_body orange_fur outside pegasus pink_hair pony purple_eyes purple_hair rabbit red_hair ribbons sayuri1314 scootaloo_(mlp) sky smile sweetie_belle_(mlp) two_tone_hair unicorn water wet white_body white_fur wings yellow_body yellow_feathers yellow_fur young young_feral

anatid anseriform anthro avian beak bird black_bottomwear black_clothing blue_bottomwear blue_clothing blue_headwear bodily_fluids bottomwear bovid bovine bracelet bread breasts cattle clothed clothing clothing_lift crying dark_blade_of_fire digital_media_(artwork) duck ellipsis erection erection_under_clothing exposed_breasts female food genitals group hair hat headgear headwear jewelry malachiexe male male/female mammal mask moobeard moobeard_the_cow_pirate nipples non-mammal_breasts non-mammal_nipples panties partially_clothed penis random!_cartoons red_hair red_outerwear robe sailor_bird shirt shirt_lift simple_background small_breasts tears tenting toony topwear torn_bottomwear torn_clothing underwear white_bottomwear white_clothing white_topwear wraps yellow_background yellow_nipples

anatid anseriform anthro areola avian beak big_breasts bird blonde_hair bodily_fluids breast_play breasts brown_eyes brown_hair cum cum_on_breasts duck duo ear_piercing erect_nipples erection eyewear female genital_fluids genitals glasses green_eyes hair huge_breasts long_hair lordstevie male male/female nipples non-mammal_breasts non-mammal_nipples open_mouth orgasm penis piercing sex smile titfuck

1:2 anatid anseriform anthro avian bangs beak big_breasts bikini bird blue_body blue_eyes blue_feathers blue_hair breasts chest_tuft clothed clothing duck feathers female fur hair hi_res huge_breasts jupiter_(mastergodai) knuckle_up! looking_at_viewer mastergodai multicolored_hair non-mammal_breasts pink_hair solo swimwear tuft two-piece_swimsuit two_tone_hair underwear wide_hips yellow_body yellow_skin

anatid anseriform anthro anthro_on_anthro avian bangs beak big_breasts bird blue_body blue_eyes blue_feathers blue_hair blue_nipples blush breasts duck duo erection feathers female female_penetrated genitals hair heart_symbol hi_res huge_breasts jupiter_(mastergodai) knuckle_up! male male/female male_penetrating male_penetrating_female mastergodai multicolored_hair navel nipple_dip nipples non-mammal_breasts non-mammal_nipples nude penetration penile penile_penetration penis penis_in_vagina pink_hair red_eyes sex short_hair thick_thighs two_tone_hair vaginal vaginal_penetration vulva wide_hips yellow_body yellow_skin

anatid anseriform anthro avian bangs beak big_breasts bird blue_body blue_eyes blue_feathers blue_hair blue_nipples breasts clothed clothing duck feathers female hair hi_res huge_breasts jupiter_(mastergodai) knuckle_up! lingerie looking_at_viewer mastergodai multicolored_hair nipple_outline nipples non-mammal_breasts non-mammal_nipples pink_hair short_hair solo translucent translucent_clothing two_tone_hair underwear upstairstudios wide_hips yellow_body yellow_skin

2013 absolutely_everyone anatid anseriform applejack_(mlp) ask_blog avian baguette banana bed bird blush bread chest_tuft chibi confusion crowded curly_hair cutie_mark derp_eyes derpy_hooves_(mlp) duck earth_pony equid equine eyes_closed fan_character feathered_wings feathers female feral fluttershy_(mlp) food freckles friendship_is_magic fruit fur furniture group hair hasbro horn horse hug john_joseco large_group laser_gun looking_at_viewer looking_away looking_back looking_up lying lyra_heartstrings_(mlp) male mammal monochrome multicolored_hair my_little_pony mythological_creature mythological_equine mythology on_back on_side open_mouth pegasus pillow pinkie_pie_(mlp) plant pony princess princess_celestia_(mlp) princess_luna_(mlp) rainbow_dash_(mlp) raindrops_(mlp) ranged_weapon rarity_(mlp) royalty scrunchy_face smile spooning teeth tongue trixie_(mlp) tuft tumblr twilight_sparkle_(mlp) two_tone_hair unicorn weapon winged_unicorn wings

anatid anseriform anthro avian bird dolan duck humor jellyvampire male meme nightmare_fuel solo what

1:1 alien alien_humanoid black_body black_skin blue_eyes breasts digital_media_(artwork) duck_dodgers female grandfathered_content hair hi_res humanoid kloudmutt martian nipples not_furry queen_tyr'ahnee simple_background solo warner_brothers white_background white_hair

2013 amber_eyes biped blonde_hair cape clothing crossover cutie_mark darkwing_duck derpy_hooves_(mlp) disney ducktales english_text equid equine female friendship_is_magic fur grey_body grey_fur hair hasbro hat headgear headwear hi_res horse long_hair mammal mask my_little_pony pepooni pony pose semi-anthro smile solo spotlight standing text yellow_eyes

1:1 2005 alien anthro blue_body blue_eyeshadow blue_skin bodily_fluids breasts crossgender cum cum_in_mouth cum_inside disembodied_penis domestic_pig duck_dodgers duo erection eyeshadow fellatio female female_penetrated genital_fluids genitals green_hair hair human human_on_anthro interspecies looney_tunes low_res makeup male male/female male_penetrating male_penetrating_female mammal nipples oral oral_penetration penetration penile penis peterson pink_nipples porky_pig sex suid suine sus_(pig) warner_brothers

3_toes anus aquatic biped blush clenched_teeth clothing countershade_tail countershade_torso countershading digital_media_(artwork) disney duo eyebrows eyelashes feet female feral fingers genitals green_body green_scales hair hat headgear headwear innie_vulva loch_ness_monster looking_back mcquack_(nessie) mostly_nude mostly_nude_anthro mostly_nude_female nessie_(disney) non-mammal_hair pattern_clothing pattern_hat pattern_headgear pattern_headwear pattern_scarf plaid plaid_clothing plaid_hat plaid_headgear plaid_headwear plaid_scarf raised_tail red_hair rubber_duck scales scalie scarf scottish semi-anthro simple_background size_difference solo_focus tail tail_anus tail_tuft tam_o'_shanter teeth the_ballad_of_nessie thunderouserections toes toony tuft ventral_scales vulva white_background

adventure_time anatid anseriform anthro avian bird blonde_hair canid canine canis cartoon_network daughter_(lore) domestic_dog duck equid equine erection ethel_rainicorn eyewear female genitals glasses group group_sex hair horn indirect_incest_(lore) interspecies jake_the_dog lady_rainicorn male male/female mammal mother_(lore) mother_and_child_(lore) mother_and_daughter_(lore) mythological_creature mythological_equine mythology on_model parent_(lore) parent_and_child_(lore) parent_and_daughter_(lore) penis rainbow rainicorn sex smile threesome toony trio unicorn unknown_artist

anatid anseriform anthro anus avian beak bird bodily_fluids breasts duck feathered_wings feathers feet female genital_fluids genitals greyscale line_art membrane_(anatomy) monochrome nipples non-mammal_breasts non-mammal_nipples nude paperclip_(artist) solo toes vaginal_fluids vulva webbed_feet wings

4:3 african_elephant ambiguous_gender amphibian anatid anseriform aquatic avian beak bird bovid bovine canid canine canis cattle dairy_cattle domestic_cat domestic_dog duck elephant elephantid english_text eyes_closed fablefire felid feline felis female feral fish fox frog fur grey_body grey_fur group holstein_friesian_cattle humor husky large_group mammal meme mouse murid murine nordic_sled_dog pinniped proboscidean proboscis_(anatomy) red_fox rodent seal smile spitz text tongue tongue_out true_fox trunk_(anatomy) tusks waterx what_does_the_fox_say white_body white_fur ylvis

anatid anseriform anthro avian beak biped bird blush butt cockatoo duck feathers heart_symbol hybrid male oovie oovie_(artist) parrot pose scales solo standing zaida_(artist)

1940s_theme 2013 accessory adolf_hitler alcohol anatid anseriform anthro areola avian aviator_cap ball_fondling balls beak beak_fetish beak_play beak_sex beakjob beverage big_butt bird bodily_fluids breasts butt cere_(anatomy) clothing colored_nails columbid daffy_duck dialogue digital_media_(artwork) dove drunk duck duo electronics english_text erection eyewear feathers feet fellatio female female_penetrated fondling food garter genital_fluids genitals german_text hatta_mari hi_res hindpaw human human_on_anthro interspecies legwear lipstick looking_back looney_tunes makeup male male/female male_penetrating male_penetrating_female mammal nails nazi nipples non-mammal_balls non-mammal_breasts non-mammal_nipples open_mouth oral oral_penetration paws penetration penile penis precum racism saliva sex social_commentary stockings substance_intoxication swastika tail tail_feathers television text thebigmansini toes tongue tongue_out tongue_out_fellatio translated vulva warner_brothers world_war_2

2013 anas anatid anseriform anthro anus areola arm_above_head asinus avian ball_lick balls berry_wabeet_(slb) biceps big_areola big_breasts bird bisexual blonde_hair breasts breath brown_body brown_fur butt cowgirl_position dabbling_duck delia_duck_(slb) donkey duck equid equine erect_nipples erection feathers female female/female female_on_top from_front_position fucked_silly fur genitals group group_sex hair hair_over_eye huge_breasts humor interspecies lagomorph leporid licking long_hair male male/female male_on_bottom male_penetrating mallard mammal nipple_fetish nipple_pinch nipple_play nipples nude on_bottom on_top one_eye_obstructed open_mouth oral pecs penetration penis pinch purple_background purple_body purple_feathers purple_hair rabbit raised_arm sex simple_background slb threesome tied_ears tongue tongue_out trio vaginal vaginal_penetration vulva

2011 anatid anseriform anthro avian beak big_breasts bird breasts busty_bird canid canine canis clothed clothing corvid corvus_(genus) crow deon_(deonwolf) digital_media_(artwork) duck felid female group huge_breasts jaeh lion male mammal nipples non-mammal_breasts non-mammal_nipples oscine pantherine passerine skimpy wolf