You can Google multiple studies that have shown that women are much more likely to cheat during ovulation ONLY if they don't find their husband particularly attractive. Here's one from UCLA:
http://newsroom.ucla.edu/releases/Ne...13?RelNum=6713
Along similar lines, the same types of studies show that women are much more likely to cheat right before their periods (ie: when they are infertile) ONLY if their emotional needs (read: provider/security needs) aren't being met.
Generally speaking, and I say that because there are some exceptions out on the ends of the curve, women do not give a flying fuck about variety. It doesn't advance their reproductive strategy at all EXCEPT if they need two partners for one to cover the attraction/genetics and the other to cover the provider side. For men, the reproductive strategy is to knock up as many women as you reasonably can.
On average, a woman can only have between 1 and 2 kids a year, at the most. Men could average having more than that on a daily basis if they picked their targets right.
Regarding RP terminology, this dualistic strategy women have is the source of the alpha/beta labeling regarding behavior. Alpha is shorthand for behaviors that deal with attraction (ie: seeking out genetic material), and beta is shorthand for behaviors that deal with comfort (ie: provisioning, security, etc.) Virtually all relationships or relationship problems between men and women can be broken down in these terms.
Quick example: The classic "friend-zoned" case is a situation where the guy gives a lot of comfort (ie: beta) and not enough attraction (ie: alpha).
You can also have "good alpha," "bad alpha," "good beta" and "bad beta" with women. Good beta might be rubbing a chick's back when she's having menstrual camps. Bad beta would be letting her boss you around and treat you like a bitch. Good alpha might be taking the initiative to ask a girl out. Bad alpha might be punching a woman in the mouth because she asked you how you liked your eggs.
Good and bad are relative, and they aren't necessarily under the umbrella of the red pill praxeology because it's inherently amoral. Whether a behavior is alpha or beta can also depend a lot on context, so there's no straightforward list of like X is always good and Y is always bad for every single little thing.
A good rule of thumb is this: If you're acting from a position of strength, you're doing it right, and if you're acting from a position of weakness, then you're doing it wrong.