I know how the leopard changed his spots.

He played on the asphalt heap with his little sister. She threw asphalt in his hair. Mom didn't notice until the next day.

Guess what stains skin brown? Yup. Asphalt!

(Sorry for the lack of a good photo....I tried, but was unsuccessful at focusing on the lovely brown spots on my boy's head!)

Come to think about it, they look a bit like liver spots....Maybe he's just getting old! ;)