I think I could forgive most things, but cheating is the most ultimate unforgivable act. Why cheat? I'd rather feel the pain of the person I loved being honest; telling me that they're not happy. I'd respect them, and if you truly love someone, you'd want them to be happy - even if it means letting them go. That's true love.

Being dishonest can be too, but sometimes being dishonest is a way of protecting yourself or your partner. If I told David not to buy McDonalds for our child, I'd hope he wouldn't. If he did, and kept it from me, he could potentially save me from the stress, and me having to give a lecture and him the earache. Not that it'd be particularly stressful, but hey, for example purposes.