When I see one of the providers on this site I regard the session as sexual therapy. Works for me. But for some there may be a feeling of guilt. For those folks there is help. From the website:
"When you cheat on your partner you add to the heartbreak, pain and jealousy in the atmosphere.
Cheatneutral offsets your cheating by funding someone else to be faithful and NOT cheat. This neutralises the pain and unhappy emotion and leaves you with a clear conscience."
http://www.cheatneutral.com/

Now on YouTube as well:
http://www.youtube.com/watch?v=f3_CYdYDDpk