http://roissy.wordpress.com/2007/09/19/defining-the-alpha-male/

Note that number of affairs is a descriptor of all alphas and no betas, and it increases with rank. Thus, infidelity reflects a man's worth positively.

If you're not going off Roissy, I apologize for misinterpreting you, but your language and his matched up almost exactly, and I've seen him linked a bit here and on OB, so I figured that's where the ideas came from.