Sometimes your worst enemy is your best friend. Sometimes its the person sleeping next to you. I had a friend growing up whose parents were divorced but still lived together. They dated other people and lived separate lives but still lived in the same house. I asked her once why that was and she laughed and said..."I don't know what it is. They've been married three times to each other. They can live together but as soon as they sign that paper that says they can only be with each other, they start hating each other. As soon as the divorce is final they can't live without each other.

I've seen a lot of strange relationships since then but on the normal scale as opposed to why aren't you in a straight jacket scale, that is the weirdest relationship I ever encountered.