This is a great invention, at least, you'll love it until your significant other figures out you have it and you get into one of the most epic fights of your relationship.

It's called the Cover Clamp, and it's just a small rubber clamp you put on your sheets and comforter. Then you slip its anchor under the mattress, and boom: Now it's impossible for your significant other to pull the covers off you in the middle of the night.

You can get one for $25 at CoverClamp.com.