FURVERT!

2014 accidental_transformation all_fours animal_genitalia animal_penis anus asinus backsack balls big_butt bodily_fluids butt close-up comic donkey drooling english_text equid equine equine_genitalia equine_penis erection eyes_closed fasttrack37d feral fur genitals growth gums hair hi_res long_ears looking_down male mammal narrowed_eyes nude open_mouth penis saliva short_hair snout snout_growth solo squint standing teeth text tongue tongue_out transformation transformation_sequence vein veiny_penis