Why do they have to grow up so fast?

Since Adam's birthday was while we were on vacation, he had his birthday party with his friends today. It was a good time - 8 of his friends at our local Rec center. All I had to do was provide the cake and the birthday boy. Watching him with his friends, being careful to include everyone in the activities - even his little brother, sister and cousin - I was so proud of my big kid. But then this evening, he looks at his dad's driver's license and made a comment about his dad's long hair in the picture. I said his dad was a handsome guy - and then to be silly, said "all the girls think so". His eyes got big and he said "Really? Cool." I could see what he was thinking..."I look just like him." It's becoming clear that he's beginning to care what girls think. I'm not sure I'm ready for that!