Re: Men wander and women want a single partner....NOT
I disagree with this whole premise. I think it's just as much an evolutionary advantage for women to seek multiple partners as men...for the obvious reason that, the more men a woman sleeps with, the more likely it is that ONE of them will believe he's the father. Having a dozen "fathers" for one child will offer a great deal more protection than having one.
Plus, if you're talking this gene-evolutionary-race argument, it is evolutionary in the woman's best interest to get the highest-quality sperm around to create the healthiest children - so it pays off to sleep (shop) around so as to find (or at least get to include) the top specimens - rather than just hanging around the first guy you get with, whatever his gene pool quality.
I read something about this research once ... not a clue where/when, so forget about a link ... it suggested something along the same lines. They measured what women were attracted to, over a longer period of time. It turned out that women gave diverging answers to questions about which men they felt most attracted to (dunno whether it was done with images or, say, live specimens or whatever) - depending on where they were in their cycle.
Not something they were aware of themselves, at all, obviously, but it turned out that, like, around ovulation time, they were more likely to pick the butch type of macho man as most attractive, while midway between ovulations they opted for the softer, gentler type. The hypothesis I believe was that the latter instinct was to ensure that they would choose someone as a steady partner who was reasonably more likely to show caring and commitment for the child, while the former instinct would have them go out to sleep with - and be actually impregnated
by - the most physically/genetically healthier alternatives. So you get the fittest child, with the most caring father. Something like that. Hey, like BK said, who was to know?