In terms of the "nice guy" arguement, fear is required to ignite the deeper emotions, and the more passionate feelings are found at the more
survivalistic end of the spectrum. So, even when the guy is "nice" there is no sense of things being "right" and things feel "empty" to the
woman, usually they feel more like the mother that their boyfriends never had, and if they cheat usually they go for the father that they never had.
When people find thier "soul mates" - its usually the brother/sister that they never had (and usually a strong genetic connection creating the sense
of connectedness, thus, why these relationships are not designed to last either).

