In today's society, Interracial relationships have become mainstream. All one needs to do is watch a little television and you'll see Blacks dating and in some cases even married to Whites. It goes both ways. Black men with White women and vice versa.
So when it comes to extra-marital affairs, I think White women aren't automatically discounting a Black partner. I serves to satisfy a fantasy and it gives the woman a chance to see if the myths are true!
Interracial porn, especially porn showing amateurs engaging in sex vice professionals, puts the idea into the mind of the White woman. They see other women, not unlike themselves, taking the plunge (pun intended) causing them to naturally extend the idea of themselves in that particular situation.
But the onus is on the husband. In most instances, she'd be content for it to remain a fantasy. So if he expresses an interest, she doesn't consider it beyond the idea of reality. That, coupled with the advent of the pill, has the effect of an increasingly positive response to the idea.
I think, given a few years, that women dating Blacks, and married women having affairs (either consensual as in an open relationship or privately cheating) will no longer be considered the 'taboo' topic that us of 'older' generations currently consider it.
Thoughts?