[quote]Certainly not always the case but, cheating is used as a crowbar to extract oneself from a difficult marriage. Often it is an unconscious plan. So it is not something to be dismissed outright as a simple moral failing. [/quote]

I did not say that the spouse who didn't cheat was completely blameless in the demise of the marriage.

What I said was that the cheating spouse is the one who is completely responsible for his/her behavior. Cheating is a choice. And the person cheating is completely responsible for that choice.

The person who is cheating could have ended the marriage first rather than cheat.

So, yes, it is because he is a immoral jacka$$. One who is risking giving his spouse AIDS/HIV because of his actions.