Funadvice Logo

How can drinking a glass of water before eating help you lose weight?

Home More advice Nutrition & Fitness

I was on the site http://funadvice.com/r/3jurldo7ed, and stumbled upon (pun intended) a thing that said drinking a glass of water before eating can help you lose weight.
Currently, I am drinking a glass, and waiting for supper to finish cooking. I told my husband when he asked me what I was doing getting a glass of water right before dinner and I told him why, and he thought it was a good idea.
How can drinking one glass of water before having something to eat help you lose weight? All it would do is make you pee right?
I'm also asking because I'm curious.