Rule 34 Dev - 4_toes 5_fingers abs animal_genitalia animal_penis armpit_hair balls big_balls big_penis bodily_fluids body_hair bound brown_body brown_fur brown_hair butt clenched_teeth collar collar_only deep_throat detailed_background duo ear_piercing equine_genitalia equine_penis erection eyes_closed eyewear feet fellatio fingers forced forced_oral fur genitals glasses hair happy_trail hooves internal internal_oral interspecies irrumatio leg_grab legs_up lying male male/male male_penetrated male_penetrating male_penetrating_male medial_ring muscular muscular_male muscular_thighs nipples nude on_back oral oral_penetration penetration penile penile_penetration penis perineum piercing platform_sex saliva sex size_difference smaller_penetrated teeth throat_swabbing toes vein veiny_penis blakenfen conditional_dnp tarrin equid equine horse mammal mustelid otter 5:4 picture_in_picture|9019958465