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 unha

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. To someone for whom that is not the case, why would it matter if they are happy or unhappy? 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. 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. 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.