Rule 34 Dev - 2017 5_fingers all_fours anal anal_sex anthro ass athletic balls beanie beige_penis blush bodi brown_fur brown_hair canine crossed_arms doggy_style erection fangs father father_and_son feet floppy_ears from_behind_position fur furry grey_nose hat humanoid_feet humanoid_hands incest khampa koruro looking_at_viewer looking_back male mammal markings multicolored_fur muscular nude one_eye_closed open_mouth pecs penetration penis plantigrade pubic_hair rock_dog sex simple_background size_difference small_dom_big_sub son tan_balls tan_countershading tan_fur tibetan_mastiff two_tone_fur white_background wink yaoi|2609513720