FURVERT!

2011 abs animal_genitalia animal_penis anthro balls biceps biped canid canine canine_genitalia canine_penis canis clothed clothing domestic_dog erection fur genitals great_dane knot male mammal mastiff molosser morticus muscular muscular_anthro muscular_male nipples partially_clothed pecs penis pose presenting sheath simple_background solo standing tail tongue tongue_out topless triknot underwear underwear_down undressing vein