What about when you want to cool of

What about when you want to cool off? It’s true that certain parts of the body — the ears, nose, cheeks, hands and feet — have special blood vessels that control cooling and warming. Special machines help overheated athletes cool their core temperature and recover from heavy exercise by dunking their hands in icy water. (Of course, dunking your head in icy water will probably cool you down, too.) - See more at: http://www.livescience.com/34411-body-heat-loss-head.html#sthash.Ee1pD2oX.dpuf