Rule 34 Dev - 2015 5_fingers abs animal_genitalia animal_penis anthro artist ass balls biceps big_muscles big_penis black_penis blue_fur bng brown_fur brown_hair canvas chair claws creating_art detailed_background dots drawing duo equine equine_penis erection feline fur hair hi_res hooves horse horsecock inside long_hair male mammal mane muscular muscular_male musical_instrument nipples nude panther pawpads pecs pen pencil penis piano ponytail pose sitting smile sofa stool tied_hair tree white_hair window yaoi|2157982784