For all of you eating those late night study snacks, there's a scientific reason you can't just eat a few chips. I just found this paper because I ate 2 bags of chips and wondering why I couldn't stop myself. Your brain is actually stimulated by these endocannabinoids which give you a sense of euphoria and essentially tell your brain "That was good, give me more!" Some scientists believe this recent discovery could potentially be used as an anti-obesity drug.
The body is an incredible thing and so are CHIPS!
Check it out for yourself: http://www.pnas.org/content/early/2011/06/27/1104675108