Cheese binds you up because in the fermentation process it produces an opiate, just not one that crosses the blood brain barrier and or gets you "high," it doesn't effect your brain, but the opiate does work on your opiate receptors in your gut, just like loperamide, the anti diahrrea med is also an opiate that doesn't cross the blood brain barrier.

My source is a little paragraph in a national geographic, it didn't give me any more detail than that and that is as I recall.