FURVERT!

1:1 aaron_(artist)animal_genitalia animal_penis anthro balls big_butt border bottomwear bottomwear_down butt canid canine canine_genitalia canine_penis canis clothed clothing domestic_dog erection flexing genitals german_shepherd hand_behind_head herding_dog hi_res knot knotted_penis looking_at_viewer male mammal muscular muscular_anthro muscular_male pants pants_down partially_clothed pastoral_dog penis pink_penis solo tongue tongue_out topless vein white_balls white_border