Glasses is Eye Windows

Glasses is surely going to affect your vision; especially after they've been filled and emptied several times.

Glasses is able to make driving a lot safer, providing, of course, they're worn instead of emptied.

Glasses is unattractive on women — men seldom make passes at girls who wear glasses.

A Key is a very specialized lockpick.

A Key is just a metal password.

The Key is an object with a special knack for tricking you into thinking it does not belong to the right lock.

Luggage is best kept at a minimum — He who would travel happily must travel light.

Luggage is wont to get lost. In fact, the rings of Saturn are composed entirely of lost luggage.

Luggage is lost so frequently that I could have sworn the attendant who tore off the luggage stub said, "Here are your lottery tickets".