FURVERT!

abs animal_genitalia animal_penis anthro anus balls biceps big_balls big_muscles big_penis biped black_hair blue_body blue_eyes blue_fur blue_nipples butt equid equine equine_genitalia equine_penis erection facial_hair fur genitals grey_body grey_fur hair hi_res hooves horse looking_at_viewer lube male mammal measuring measuring_penis muscular muscular_anthro muscular_male nipples nude obliques pecs penis ruler saruuk smile solo spanners spots spread_legs spreading thick_penis triceps vein veiny_penis