Why Is It That Often The Last Bite You Eat Is The Worst Bite?

I'm on to some thought provoking stuff here.  How many of you have had a full meal, whether is a four course or a big burrito and it's the best thing ever, until you have that last bite? You know, you end up with too much tortilla, or a big fatty or stringy piece of meat?

I believe the food gods are laughing at us and tormenting us. Why doesn't that cruddy bite happen somewhere in the middle of the meal?  How does it strategically place itself in a place to not be eaten until last (I guess in the case of the burritto I know).  How is it you can cut a steak into 20 pieces, eat them at random and that last piece is a gristle filled piece of crap?

These things are like the political comments of rockstars, they ruin every thing that came before them.  All that enjoyment, all that taste and blamo! It's all blown to hell by a black spot on a potato. I can't figure this one out.  Icky stuff must have a special gravity to it or something.

While we're on the topic of food, here's some VERY interesting food facts from the fine folks at Buzzfeed.