FURVERT!

2008 animal_genitalia anthro asinus ass_up biped biped_to_quadruped briefs brown_hair clothing donkey equid equine feral_transformation flaccid foreskin four_frame_image four_frame_sequence genitals growth hair hooves human human_to_feral kuma male mammal penis pleasure_island quadruped sequence sheath shirt solo species_transformation surprised tail tail_growth tank_top tighty_whities topwear torn_clothing transformation transformation_sequence underwear white_briefs white_clothing white_shirt white_tank_top white_topwear white_underwear