FURVERT!

anal anthro biceps big_butt big_muscles black_body black_fur black_nose brown_body brown_fur brown_hair butt butt_crush butt_grab canid canine canis cushion domestic_dog duo equid equine eyes_closed facesitting fur grey_background hair hand_on_another's_butt hand_on_butt hi_res hooves horse interspecies larger_male larger_on_top larger_rimmed leg_markings lying male male/male male_penetrated male_penetrating male_penetrating_male mammal markings mohawk muscular muscular_male nude on_back on_top open_mouth oral penetration red_hair rimming seat sex simple_background sitting sitting_on_another size_difference smaller_male smothering socks_(marking)tail tail_wraps tan_body tan_fur teeth tongue vamplust wraps