Not for me. It was to fill the sexual hole in my life, no pun intended, and nothing else. Certainly there was an ego component of wanting to be desired in that way, but it was not emotional in any way, as that was not missing from my marriage.Every single man I've talked to about why they cheated eventually admitted part of the attraction was emotional ego validation.
What was missing was a satisfying sex life. The reason I'm even bothering to respond is to counter the pigeon holing that so surrounds this topic - there seems to be no end of others wanting to tell ME why I did something and what it says about me rather than hear the actual reasons.