How to Lose Weight – Avoid Skinny Overeaters:

Via Time.com:

If you’re looking to lose weight, here’s a simple tip: don’t dine with the skinny dude who stuffs his face. According to a study that will appear in the April 2010 issue of the Journal of Consumer Research, both the size and the consumption habits of our eating companions can influence our food intake. And contrary to existing research that says you should steer clear of eating with heavier people who order large portions, it’s the beanpoles with the big appetites you really need to avoid.