[steven]

That's interesting. I can understand that perspective very much. That might actually help give a plausable explanation for the survey's results. Perhaps the fact that a lot of men get home late from work (or have long nights drinking after work) there is a tendancy for them to sleep in another room out of convenience-- which means they're trying not to wake the wife or need to get a "good night's rest" for the next day or whatever it may be.

I was thinking along the lines that some couples who were "matched" when they were younger just don't want to sleep together every single night. That may be the case for some people, but who knows.

I wonder what a similar survey would look like for the UK/AU/CN/US etc.