Rule 34 Dev - butt butt_sniffing depth_of_field duo facesitting feet foot_focus foreshortening fur hair heart_symbol long_tail male male/male nose_to_anus nude prehensile_feet simple_background sitting_on_another smile sniffing tail toes nommz valin_(nommz) haplorhine mammal monkey primate d 2013|3403420930