Rule 34 Dev - animal_genitalia animal_penis anthro balls big_balls big_penis biped equine_genitalia equine_penis erection foreskin genitals glowing hair hooves male muscular muscular_anthro muscular_male nude penetrable_sex_toy penis sex_toy sitting smile solo spread_legs spreading tito-tonton deer equid equine horse mammal hi_res|9289476595