Rule 34 Dev - 2016 3boys 5_fingers abs animal_genitalia animal_penis anthro anus armpits ass back black_penis canine canine_penis chains chumbasket equine_penis erection fur gay green_eyes group hi_res horsecock knot looking_back male male_only mammal multicolored_fur nude penis perineum precum precum_string raised_tail rear_view red_penis restrained solo_focus testicles tongue tongue_out vein veins veiny_penis yaoi|2388904040