FURVERT!

2d_animation animal_genitalia animal_penis animated animated_gif anthro athletic balls becoming_erect big_balls big_penis black_and_white blarf butt clothing cockslap equid equine equine_genitalia equine_penis erection expansion frame_by_frame genital_expansion genitals hi_res hooves horse huge_penis male mammal monochrome mostly_nude musclegut muscular muscular_anthro muscular_male nipples penis penis_expansion punched short_playtime sketch slap slightly_chubby solo violence wardrobe_malfunction weapon