Part of it is wanting what you cant have I think yes.

I think part of it is people just enjoy a challenge
Desperation rarely if ever looks attractive

Playing hard to get is a tactic as old as high school.. It's as old as the attraction itself in time... This isn't anything new here...

It may also be somethign that puppy mentioned... When you find your dignity, your voice, your self-respect, that will command others to respect you as well... your cheating spouse included. When YOU are worthy of respect, you are worthy of pursuit.

Years and years of living togehter can cause respect to fall apart.. you see every crack and every wrinkle in each other.. you have seen each other at their worst.. and respect declines because of that.. the mystery is gone, the truth is all that remains.. and some people choose to disrespect their spouse based on what they eventually find.. and in some cases what they find is a person who wasn't ready for marriage, many of us, myself included made a lot of mistakes along the way and that will lead to our spouse losing our respect. I don't agree with the RESPONSE to that, But I can understand how they can be prepared for it.

I don't suggest any LBS take the blame for an affair, but I do reccomend they take ownership of making the affair EASY to have rather than making it difficult...

The more mistakes you make as a spouse, the easier it makes it for your spouse to find the foolishness to cheat.