The Love Triangle: My Theory

It seems like every book has one. But what is it with them? I mean, everyone knows that they are no fun in real life, so why do we have the urge to write about them?

This is my theory: 

The author of a book with a love triangle in it has likely participated in one during his/her life. Whether he's the one that had to choose between two people, or she's the one that got left out, or he's the one that found true love and had to let the other go, they've likely all experienced one. So, to let out the pain/joy/anger/peace, whatever, that they went through, they wrote about it.

The way I see it, authors and their characters are sort of like actors in a play. When I'm in a play, I tend to merge the character with myself. Sure, I read the lines from the script, but I say them in my own way. I make them my special. I think that, while the characters are definitely different from us authors, they merge with us. They have their own lives, but each one has a sprinkle of our personality traits in them. 

So, in my theory, if an author has experienced a love triangle, then one will likely appear in their book. Your thoughts? 

~Elizabeth