Infidelity

Loads of people at some point have either done it or thought bout doing it and in most cases it doesn't happen because you don't love the person your with any more it's always a little more complicated than that. I would put it mainly down to boredom, either with the relationship, work or the sexual routine you tend to find yourself in in a long term relationship. Especially if your living with your partner, you loose the sense of fun and excitment after a while when your stuck in the same routine, because when you do get to spend time together your generally too tired and p*ssed off after you get home from work to bother doing any thing, sexual or not. Or maybe your just a sex addict and your partner doesn't put out enough! Having more than one partner hasn't always been frowned upon and still isnt in some countries, many people are still having open relationships today, so i would like to partly blame our modern culture for all the heartbreak over cheaters. It is not only the actual cheating that hurts so much, the build up of lies and deceit can be much more painful than seeing your partner kissing some one else in a club, as this can always be chalked up as a mistake. The amount of time that a particular affair has been going on makes people resentful that they could be so oblivious and that their partners could actually do someting like this the person they are ment to love. Although , as already mentioned, it has little to do with the lack of love in a relationship that leads to people cheating, theres a lot more behind a decision like this, but people rarly recognise this and jump off the deep end, ending a relationship which was previously working for them in some way. Fair enough when it comes down to a serial cheater dump the b*sterd because they ain't gong to learn other wise.

http://psychological-counselling.suite101.com/article.cfm/reasons_for_extramarital_affairs
http://uk.askmen.com/top_10/dating_60/82_dating_list.html