Rule 34 Dev - 2016 4_toes 5_fingers anal anal_sex animal_genitalia animal_penis anthro anus ass balls bed biceps blue_fur blue_hair bulge chest_tuft claws cum dragon duo erection firon fur furry humanoid_penis inner_ear_fluff knot long_hair male mammal muscular open_mouth paws penetration penis reptile scalie sex sheath shiuk signature size_difference sly spread_legs spreading toes tuft watermark wings yaoi|2398463904