Brain Teasers

What can you hold in your left hand, but never in your right?

You measure my life in hours, and I serve you by expiring. I’m quick when I’m thin and slow when I’m fat.

This belongs to you, but everyone else uses it.

I have seas without water, coasts without sand, towns without people, and mountains without land. What am I?

Which word in the dictionary is always spelled incorrectly?