FURVERT!

abs animal_genitalia animal_penis anthro athletic balls biceps big_penis biped blue_eyes equid equine equine_genitalia equine_penis erection flared_penis forefinger fur genitals grey_body grey_fur grey_hair grin gryx hair hooves horse male mammal muscular muscular_anthro muscular_male nude open_mouth pecs penis pose presenting sheath simple_background smile solo standing tongue vein