FURVERT!

2011 abs animal_genitalia animal_penis anthro athletic balls biceps big_balls big_muscles big_penis biped black_penis brown_body brown_fur brown_hair equid equine equine_genitalia equine_penis erection flared_penis fur genitals grey_background hair hooves horse kooskia male mammal masturbation muscular muscular_anthro muscular_male nipples nude pecs penile penile_masturbation penis pose presenting rov rubin sheath simple_background solo standing thick_penis vein white_body white_fur