What do you want to be for Halloween?

So, this morning I asked Carter (since he is still ambivalent about what he wants to be) if he could be anything for Halloween what would it be? He said, "a mommy." I asked him, "what would you wear for your costume?" He answered without hesitation almost like a 'duh mom' look on his face... "a robe." I'm surprised he didn't add and sweat pants, with splattered food and snot all over them, with hair pulled back.