Rule 34 Dev - animal_genitalia animal_penis ark_nw balls bodily_fluids cutie_mark equid equine equine_penis erection feral feral_on_feral hi_res horse horseballs horsecock larger_male male male/male mammal my_little_pony penis penis_size_difference size_difference smaller_male sweat the_lusty_stallion vyktor_dreygo|3855515280