FURVERT!

2015 animal_genitalia animal_penis balls black_body black_claws black_fur black_pawpads breath brown_body brown_eyes brown_fur canid canine canine_genitalia canine_penis canis claws curdog dewclaw digital_media_(artwork)domestic_dog erection feral flat_colors fur genitals german_shepherd guide_lines herding_dog knot knot_in_sheath lying male mammal on_back open_mouth panting pastoral_dog pawpads penis penis_tip pink_penis pink_tongue presenting sheath simple_background solo tongue tongue_out