FURVERT!

2014 anthro anus backsack balls biped black_body black_fur canid canine canis claws erection foreskin fur genitals heterochromia humanoid_genitalia humanoid_penis looking_at_viewer lying male mammal multicolored_body multicolored_fur on_back partially_retracted_foreskin penis shadow-teh-wolf solo tongue tongue_out truegrave9 vein wolf yellow_nose