Re #2: and if it's only heterosexual people, is it about those of us who are strictly unisexual (I go for cismen only and can't imagine wanting to be with anyone else), or with people who are more able to be open?

Also, at least they mention that other studies have contradicted this, but now they're lapping up this one study that goes along with pre-conceived notions as if it's a big deal. I'd say if one study contradicts a bunch of other studies, then there's likely a problem with the one study. And they don't even mention that, if there is a difference (doubt it), it's because men have a much larger share of the economy than women.