Rule 34 Dev - 136 2015 age_difference all_fours anal anal_penetration anthro anus ass backsack bear bed big_dom_small_sub big_penis big_testicles brown_fur canine dog duo faceless_male fur furry gif larger_male loop lying male male/male male_only mammal on_front original penetration penis perineum rear_view sasha_(sashabelle) sashabelle sex size_difference smaller_male testicles thick_penis tight_fit|651916