Rule 34 Dev - 4_toes anthro anus aoru ass balls black_and_white black_nose canine castrated castration claws couple erection eunuch flaccid furry furry_only gay hindpaw humanoid_penis leaning looking_back lying male mammal monochrome nipples no_humans nude on_back paws penis plain_background presenting presenting_hindquarters raised_tail scar spread_legs spreading thighs toe_claws uncut vein|1672394624