It seems logically obvious to me that infidelity would be almost completely unrelated to happiness in a relationship because it doesn't matter how happy or unhappy I am, cheating is off limits.<p>To someone for whom that is not the case, why would it matter if they are happy or unhappy?<p>As the article states - being cheated "on" is not a matter of what you've done, someone who isn't inclined that way won't do it ever. I don't even put myself in situations in which the temptation would be there e.g. hanging out with members of the opposite sex.<p>In contrast, I've "stolen" carrier bags from the supermarket ever since the bag tax came in in the UK. The expense is trivial, I'd never even notice the difference. I just don't agree with the value system there, so wherever I can get away with it I do.<p>Some people feel that way about relationships. I think it's wrong and abhorrent, but then I feel like a lot of what goes on nowadays is pretty weird, so eh.