Are those feminists aware of something called testicles? Do they know how unpleasant it is to have those squeezed while siting with the legs together or crossed?

women also tend to blend together more seamlessly. studies find that they even police each other such that nobody gets too 'big for her britches'. posture would be one of the many ways this manifests.

men are in greater overt competition with each other, especially in a culture in which they're so worried about being seen as gay or even just passive. therefore, more posture space desired. there's also simply the desire to look larger, more relaxed, more potent, etc.

As mentioned by Fenrisulven, if women had two large chunks of meat between their legs along with a huge tube shaped object (and thank god they don't), they'd sit like men also.

.

Still, the last one is a moron.