FURVERT!

animal_genitalia animal_penis anus balls black_nose blue_body blue_eyebrows blue_fur blush border_collie brown_eyes butt canid canine canine_genitalia canine_penis canis claws collie domestic_dog erection eyebrows feet feral fur fur_tuft genitals grey_background grey_body grey_fur herding_dog hi_res knot light male mammal pastoral_dog pawpads paws penis pink_anus pink_blush pink_pawpads presenting presenting_balls presenting_hindquarters presenting_penis rileysockfoxy sheepdog shifty_(shiftycollie)simple_background solo spread_legs spreading toes tuft