Ice

Martin: (curling up into bed) Brrr. I am freezing.
Me: (lays into bed and attempts to rub chest with hands)
Martin: Ahhh! What are you doing???
Me: Oh. I was trying to warm you up. I forgot my hands are like icicles. 
Martin: Ha. It's like its opposite day or something. Usually your the one yelling at me for cold hands. Except usually my hands are cold from being outside. Yours are cold because of some weird, hereditary circulation problem.