Actually, it makes sense to me... Popular culture tells us many guys fantasize about being with more than 1 woman at a time. My guess is that the women find they like the attention and maybe even have some latent lesbian tendencies... While the guys get worried that their women might discover they really don't need the guys.
Mark
“However, for the confusing part, once into the lifestyle, the men were also the first to want to give it up. The women were more apt to report that they missed it. “
Many women are cowed into thinking they aren’t good at sex. Once they’ve had some practice, and they finally understand how much power it affords them, it’s hard not to stop.
Everyone gets better at things with practice. Once you get to like it, the more you practice. The better you get, the more power it affords you.