Rule 34 Dev - 2012 anal anal_sex anthro anus backsack balls bandana bigmaster bite black_fur black_hair black_nose black_pawpads blush bull_terrier cairo_(bigmaster) canine claws duo fur grabbing_sheets green_eyes hair kihu looking_back lying male male_only mammal multicolored_fur nude on_front on_top pawpads peable penetration penis perineum pink_tongue purple_eyes signature simple_background speed_bump_position teeth toe_claws tongue tongue_out two_tone_fur white_background white_fur yaoi|2377196904