Why do people cheat on their partners when they are in a loving relationship?

For the novelty and becoz once you cheat and get away with it it becomes a addiction.

Weakness, I think. Maybe even boredom. Some people just get bored, some people have been influenced through out their lives, subconciously or not, and so they go through with it. I don't know, only they can tell you. -Duck and Cover

I went through therapy to know the answer to this one ... seems a cheater will always cheat it is not that they do not love the one they are with they are seeking the thrill of doing something behind their back, the thrill of the new love feeling and the thrill of never being caught, once a cheater starts they never quit and you can't make them.

A lot of people are afraid of commitment. When they cheat on their partner they are doing so because they think that they will keep commitment at bay. Of course they are right. Another reason is plain old human selfishness. They want to so they just do it. It doesn't matter to them that it will hurt the relationship.

I thikn its just them being weak. I feel like my husband has been unfaithful a few times. i wont go into details on why I suspect it but we have a good relationship. I try to do everything for him but I think some people are just programmd wrong. I just hang on and do what I need to fo myself and hope he comes around and realizes that I feel like this and that if I have hard proof I am outta here.