In my experience, there are a lot of good women in the org. who get overlooked as marriage material, because they aren't pioneers, aren't pretty or thin enough, or don't come from a prominent family. But, I'll let daringhart go on this one, because it sounds like he had some bad experiences.
And it goes both ways, as I got older, it suprised me how many married brothers liked to flirt with the single sisters. I'm not saying most wanted to take it any further, but as we know this happens a lot.