rule 34 2015 aiden aiiden anal anal sex anthro anthro on anthro anus ass backsack balls bed black nose blue fur blue penis blue tail blush brown fur brown tail canine cheek tuft clothing countershading cum cum drip cum in ass cum inside digital media artwork dripping duo ear piercing ears back erection eyebrows feet flaccid foot fetish foot lick fur grey background half closed eyes hand on thigh holding penis humanoid penis inside leg glider position leg grab legwear licking looking back looking down looking pleasured looking up lying male male penetrating mammal multicolored fur multicolored tail mustelid nude on side open mouth otter partially retracted foreskin paws penetration penis piercing pink tongue presenting raised leg robbie rotten robbie sex side view simple background socks square crossover standing tattoo tongue tongue out tuft two tone fur uncut white background wolf yaoi 2642647