In my elementary school we were left to choose our own type of milk each day: whole, skim, or chocolate. I'm not sure I ever saw anyone choose anything but chocolate. Those whole and skim containers could have been made out of wax for all I know. I thought of it the other day when one of my pregnant friends mentioned to me that she found out chocolate milk is loaded with caffeine. I reflected on the wild behavior in my school lunchroom, and even some of my own erratic dessert-trading schemes, and I don't even have to look it up. I know she's right.