FURVERT!

4_toes anthro anus aoru balls black_and_white black_nose butt canid canine claws duo erection feet flaccid foreskin genitals hindpaw humanoid_genitalia humanoid_penis leaning looking_back lying male male/male mammal monochrome nipples nude on_back paws penis presenting presenting_hindquarters raised_tail retracted_foreskin romantic romantic_couple sackless scar simple_background spread_legs spreading tail toe_claws toes vein