FURVERT!

2004 anatomically_correct animal_genitalia animal_penis anus balls butt equid equine equine_genitalia equine_penis erection feral genitals greyscale hooves horse klaus_doberman looking_at_viewer looking_back male mammal medial_ring monochrome penis presenting presenting_hindquarters puffy_anus raised_tail simple_background sketch solo tail tail_anus