Rule 34 Dev - anthro balls bent_over biceps big_dom_small_sub blue_penis butt dominant duo ear_piercing erection femboy genitals hot_dogging interspecies larger_male male male/male muscular nude pecs penis piercing raised_tail red_eyes sex size_difference smaller_male standing tail kuni equid equine horse lagomorph leporid mammal rabbit 1:1|235491655