Danke. I'm a bit relieved to see you didn't find much either in terms of representative samples of the general population; I can feel a bit better about being lazy. (I did get a kick out of the popularity of open marriages among the kind of people who answer surveys on Oprah's website.)
This is a thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. The previous "stupid" questions thread went to over 800 comments in two and a half weeks, so I think it's time for a new one.