all_fours anal anal_sex animal_genitalia bed blue_eyes canid canine canis coil_gshep collar detailed_background dildo doggy_style domestic_dog domination duo fennec fox from_behind_position fucked_silly fur german_shepherd hair hi_res kai knot leash looking_pleasured male mammal open_mouth penetration penis sex sex_toy smile smirk teeth tongue tongue_out yaoi yellow_eyes yoshi2332