sorry if my post came across as meaning that single mum = separatist, that's not how i intended it. (although i bet there are some who would see it as that, in quite an accusatory way.)
i was thinking more of how it can be like that - when we first moved here (the US) i was on a visa that stopped me from working. i found a group a bit like mn in rl, went on mn, helped at dd's school which is nearly 100% female staff (the exception being the principal), and other mums helped out. when i took dd to brownies, swimming etc it was almost all mums who did those things, at the school bus stop it was mums, and at the grocery store a large % of the check-out staff are female.
if i hadn't been married to dh, i would have been living an almost entirely female lifestyle. i can imagine that the same is true for many sahm who don't have a male partner.
i'm with SAF that I'd like to see some different types of family being accepted. i mean WHY is it so shocking that one man should have 3 wives (or a woman several husbands?), but infinitely less shocking for a man to have an affair behind his wife's back?
to me, it all comes down to materialism & power - these systems were put in place to protect the finances & possessions of the men, and then we are told that it is 'god's will' or 'best for the kids', or even that we can't be happy unless we are like this. who says so?
i'm sure many people are happy in their family set-ups, but that also others aren't. that doesn't make them bad people. they should be able to find a way that makes them happy, without being judged. ( i am, of course, NOT referring to any relationships with any abuse in them, that's a whole other issue)