FURVERT!

1:1 aaron_(artist)abs animal_genitalia animal_penis anthro balls big_balls big_penis bodily_fluids border equid equine equine_genitalia equine_penis erection genital_fluids genitals hands_behind_head hi_res horse inside looking_at_viewer male mammal medial_ring muscular muscular_anthro muscular_male nipples nude pecs penis precum solo white_border