FURVERT!

1:1 4_toes 5_fingers abs anthro balls barefoot biped black_nose blue_eyes brown_eyes canid canine canis chest_tuft claws erection feet fingers fluffy fluffy_tail fur genitals gradient_background grey_background grey_body grey_fur heterochromia holding_penis knot low_res male mammal nipples penis simple_background sitting solo source_request tail toes tongue tongue_out tuft unknown_artist wolf