The Real Reason Giraffes Have Long Necks

We were studying animals from Africa in the second grade. There was a discussion about giraffes and a child raised his hand and asked "why do giraffes have long necks?" I started to explain how their long necks enabled them to get leaves from the tops of the trees etc. when another child raised his hand, waving it around, desperate to be called on. "Yes Alan" I said. He stood up and said "No, the reason giraffes have long necks is that their feet stink!"