Wow... so you want to try to understand something when you don't even have a frame of reference for it?
If you're a vegan/vegeterian or something like that, just let this thread die. This is seriously like explaining blue to a blind person, only more asinine. Eat a damn burger or don't. But if you're going to eat one, make sure you get a good one. McDonald's should not be the place where you go to get your first hamburger.