Just everybody has been getting this story wrong.
Normal weight men and overweight men reported the most sex partners, and underweight men reported the least.
The same holds for women. And people have been reporting that fatties thus have more sex.
No, that’s not what they’re saying. They’re saying that fatties have more sexual partners. This is not the same thing as more sex.
Think of it this way: you’re Adonis, the fit bird with the gorgeous knockers drops her knickers for you. And, given the monogamous proclivities of most human females lets on that she’ll only continue doing so if you behave. You’re going to be getting lots of high class sex but you’re not going to be chalking up many partners.
You’re not, in short, going to be chatting up the fat birds in the last 10 minutes of the disco hunting a shag. And if you’re the fit bird with the great knockers you’re also not going to be one of the fat birds being chatted up, you’re long gone with Adonis there.
It’s not complete and perfect as a point of course: but in some manners more sexual partners can be an indication of less sex: ‘coz it’s an indication of not getting it regularly with the one person.