FURVERT!

2d_animation animal_genitalia animal_penis animated animated_gif backsack balls balls_expansion becoming_erect big_penis bouncing_penis butt crotch_shot digital_media_(artwork)equid equine equine_balls equine_genitalia equine_penis erection expansion faceless_character faceless_male flaccid flared_penis foreskin genital_expansion genital_shot genital_transformation genitals glans hi_res horse huge_penis human human_to_anthro humanoid_genitalia humanoid_penis long_foreskin long_penis male mammal nude penis penis_expansion penis_shot sakitastar short_playtime solo species_transformation transformation unretracted_foreskin urethra vein view_between_legs xaie