It's funny. My wife and I don't believe that a woman's place is in the home (she is actually a pretty radical feminist), but that's how it ended up. Her staying home with the kids doing the cooking and whatnot.
I'm in the "a woman belongs wherever the fuck she wants to be" camp, myself.
I'm struck by how...disingenuous these questions come off as, especially the one we're presented with; it makes no attempt to provide the opposite, which to me seems a bit biased. Furthermore, I would stress that both parents working means less time with each other, and less time with children, so that would ALSO move that a bit.
And...it was around the 90s that this began to creep up in the public sphere, where the mother would HAVE to work, or else they weren't going to be able to pay bills that month.
The way I see it, this is a strong economic and familial bias, the likes of which weren't particularly strong until the early-90s crashes began.
And it's only gotten worse since, with wars, further crashes, terrible economic policy.
I'd stake my future career on it.
Is this another reason why they are also having much less sex?
Less time together means less time to have sex together. The increasing popularity and openness of flings, one-night-stands, casual sex, leans me that way, too. And it's seem everywhere -- Japan, Germany, France, and the UK have similar (albeit not equal) problems with slowing sex lives and less time together, which I, again, will tie to economic stress, especially as temporary and part-time labor continues to skyrocket. The weird hours means one person in a couple might be waking up for work when the other gets home from work, and the jilted schedules leaves less time for anything together.
I'm uneasy, because this explains the problems here TOO well. It's off to gather more data, then...!