Re: I dont even know why I did it.....
It's usually an emotional choice, not a rational one, so "I don't know" actually makes sense. If people were actually reflecting and understanding themselves, they'd be far less likely to cheat as a "solution."
Bottom line, they want something and may not even know just what that is, but they're either not getting it at home or the lack is in themselves. Someone different, perhaps even your antithesis, at least is different - and different is novel and exciting, if nothing else.
Love is an ideal thing; marriage is a real thing; a confusion of the real with the ideal never goes unpunished. - Johann Wolfgang von Goethe
Marriage: A process which joins two happy, healthy, functional people to produce a miserable, dysfunctional pair more than half the time.