Age.

You're only as old as you feel.

Or young, as the case may be.

Today, in the changeroom, I was feeling gooood.  Trying on skinny jeans, which I thought looked not bad, if I do say so myself.

The lovely sales girl told me the same thing.

Then she told me that her mom had a pair and they actually look great on her.

Huh.

You're only as old as you feel.