FURVERT!

1:1 2015 animal_genitalia animal_penis anthro athletic athletic_anthro athletic_male balls black_body black_fur black_hair canid canine canine_genitalia canine_penis canis collar collar_only erection fur genitals grey_body grey_fur hair hands_behind_back i-psilone knot knotted_penis male male_anthro mammal muzzle_(object)muzzled nipples nude nude_anthro nude_male penis red_penis simple_background sitting solo spread_legs spreading tail white_body white_fur wolf