Good Riddles

Question: What has classes but moves?

Question: If you're looking for something sweet I know what to do.
But if you don't like heat I'm not for you.

What am I?

Question: I am a nice word composed of five letters, but the Romans would call me a numbers.

What am I?

Question: A man named Edward was born on December 21st, yet his birthday is during the summer this year.

How could this be?

Question: You are a surgeon who has to perform 3 operations today, but you only have 2 pairs of gloves (a and b) to perform the operations. Each of the people you are performing surgery on are infectious so you cannot touch any of them or their bodily fluids and they can't touch each other's bodily fluids. How do you perform all 3 operations with only 2 pairs of gloves?