FURVERT!

animal_genitalia anthro anus aquarix backsack balls blue_anus blue_eyes blue_penis butt canid canine canis digital_media_(artwork)dobermann domestic_dog duo erection fur genitals german_shepherd hair herding_dog hi_res humanoid_genitalia humanoid_penis male male/male mammal pastoral_dog paws penis pinscher sheath simple_background sinsquared smile spread_butt spreading zrin