Blackfoot
I respect your opinion that you do not see any benefit to affairs. The person having the affair will obviously have a different perspective than the one being betrayed (like you were).
I don't think all affairs are created equal. Someone who has an affair to just have a sexual thrill ( I think of a macho serial cheater type, cocky, confident, just wants a new piece of ass once in a while) are NOT the same as someone like myself or Globule who reached out the OP when they were at a horrible low point in their life. Low self-esteem, depression, etc. That OP is facilitating all of the postitive feelings that Lil has so eloquently expressed in other posts. The feelings that the person has within themselves but cannot get out no matter how hard they try. It is very hard to describe unless you have gone through it and I'm sure that you haven't.
In fact, if you weren't so anti-affair, I think your personality traits would fit you into the "serial cheater" category I just described much more so than in the "desperate for EC/PC" category. Please stop judging others when you do not understand where they are coming from. People in glass houses and all...