Science: Attractive parents more likely to have daughters

Candor compels me to preface this by admitting it’s pretty much all boys in my family.

Sorry, mom.

It’s good to know, though, that when Kirsten Powers and I finally get together, we don’t have to wait to start thinking about pink themes for the nursery:

[W]hy are beautiful people more likely to have girls? Kanazawa says scientists studying humans and other species have found that parents who possess any heritable trait that increases male reproductive success at a greater rate than female reproductive success will have more males than female babies, and vice versa.

Because men value physical attractiveness more than women do when looking for a mate, good looks increase the reproductive success of daughters much more than that of sons. So attractive people should have more daughters — which is exactly what Kanazawa found.

Is there any heritable factor that does more for male reproductive success than hotness does for females?

Besides wealth, I mean.

And, of course, “confidence.”

Here’s the good news:

His theory also suggests that, over time, women should have become more attractive than men. These data confirmed his hunch. More than half of all women in the sample — 52 percent — were rated as “attractive” or “very attractive,” compared with 42 percent of the men.

In a million years, all women will look like Angelina Jolie. And all men will be really, really self-assured. Evolution, baby: it’s enough to make me wonder if we need those sex robots after all.