Rule 34 Dev - 2010 animal_genitalia animal_urethral_insertion anthro anthro_on_feral balls biceps big_balls big_muscles big_penis cock_vore equine erection fellatio feral gay group group_sex horse interspecies male mammal muscles nipples nude open_mouth oral penetration penis sex smile standing teeth threesome toned tongue urethral urethral_insertion urethral_penetration vore whitecolt yaoi zoophilia|1871960816