When ex-spouses cheat with each other (even though they are re-married to other people)

They divorced. They married other people. Now they are cheating on their spouses – with each other! I just got this one from a Dear Abby column. I thought, rich. Really rich. Why get divorced and re-married if you are going to do this? What is wrong with the two of you? I guess some people just need the edge of cheating to get going. It’s weird how cheating can really excite some people, and dry other people up. It’s really weird interesting.
But I find this scenario slightly annoying. I mean, if you still want each other, stay married. Don’t marry other people and then cheat on them behind their backs with each other. That is just dirty. There is nothing sexy about it at all.