"I think my hypothesis still applies in the case of marriage insofar as past behavior predicts future behavior."
You could be right but I disagree. I think how the marriage evolves dictates sexual behavior. If a partner is satisfied at home it'll cut down on the chances of cheating. When things get dull and stale and there's no romance or sex or whatever satisfies your partner, eventually he or she will consider cheating and then maybe go through with it.
"I think men have to act a lot "sluttier" to get that title..."
Strange but true. Maybe society is cutting us some slack because we're always horny? That's my best guess.
Pretty good guess. One of the inherent differences in men and women is that men are always on sexually. Women have always been the civilizing factor when it came to promiscuity. Men tried, women said no.
That's why promiscuity is so unbelievably exagerated in the gay community people. You have all of these sexual aggressors, and no one pulling back.
Camilia Paglia said it best: Gay men wind up in sexual relationships without love, because it's their nature. Gay women wind up in relationships that have love without sex.