making a point

This guy buys some new underwear from a department store.

He takes them home and tries them on, but to his dismay they don't fit properly, so off he goes back to the store.

When it's his turn at the customer service window, the lady asks him why he's returning the underwear.

The man replies by asking the saleslady, "Have you ever heard of the ballroom in the Washington Monument?"

The puzzled saleslady scratches her head and says, "What ballroom?"

The man snaps, "Exactly!"