Driving a car doesn't always sound like fun.

You have friends who have kids.

You are taller than the slide at the McDonald's playland.

Your parents' jokes are now funny.

Naps are good.

When things go wrong, you can't just yell, "Do-over!"

You WANT clothes for Christmas.

You look in the surveillance camera monitor at the convenience store, wonder who that guy is standing at the counter with the bald spot, and then realize it is a shot of you from behind.