Oh good heavens no, I don't mean to suggest anything of the kind. My own sense of things is, I think, much the same as yours. 

It does seem likely to me that across populations of men/women, differences in biology (hormonal make-up and what-not) would produce some spontaneous sortings by sex. But I don't for a minute think that such "natural" sortings, if they exist, justify or entail patriarchy and it's myriad ills. I completely agree that those, "vast areas of social interaction" should not be fenced and cordoned. I regard such divisions as deeply harmful. I'm sorry that I gave a different impression, but I was trying to pitch my remarks towards Tony, with an eye towards constructive engagement. Many thanks for your comments on this topic.