I used to be one a long, long time ago. I was a shallow selfish skinny bitch in my twenties who never wanted to settle down or marry or have children and as far as I was concerned (at the time, I was WRONG, I know that now,) they were the ones who had made a commitment to someone else, not me. No siree, I wasn't going to take any responsibility for my actions at all, selfish cow that I was. I absolutely wasn't interersted in them leaving their wives because I didn't want a relationship, I wanted no strings flings. I am very ashamed now. God, should have changed my name I suppose but hey, I can't change the past. Anyway, that may be the insight you wanted.