FURVERT!

2013 4_toes animal_genitalia animal_penis anthro balls biceps biped black_nose canid canine canine_genitalia canine_penis canis claws detailed_background digital_media_(artwork)digitigrade erection eyes_closed feet flexing foot_focus full-length_portrait fur genitals grass grey_body grey_fur half-erect hands_behind_head happy hindpaw knot knot_in_sheath lying male mammal muscular muscular_anthro muscular_male nature nude on_back outside pawpads paws pecs penis penis_tip plant portrait pose presenting reclining relaxing sheath sitting smile soles solo spread_toes tail thundergrey toe_claws toes tree vallhound white_body white_fur wolf