One of our little boys loves to be tickled and if you do it once he keeps asking you to go it again and again and again. Even if you have come inside with really cold hands and you put your hand up his back he shreiks with laughter and even asks you to do that again?! I can understand the tickling part but freezing cold hands that is something else. Our other little one is the total opposite and cant take being tickled and he preffers to be chucked in the air or something. Really strange. Is that normal though?