If that sounds strange to you, consider this: A survey of East and West Germans after reunification in 1990 found that Eastern women (the socialist side of Germany during the Cold War) had twice as many orgasms as Western women.

What in the world accounts for such a wide gap?

According to Ghodsee, it’s about social safety nets. If, she argues, you build a society that supports women and doesn’t punish them for having children or devalue their labor, it turns out they’ll be happier and have better sex.

But it doesn't matter how many studies or surveys or policy differences you point to -- some guy always has an old relative whose story outweighs everything.