Since there are so many different kinds of swinging it has been too difficult to test how many who does it but you can read more here: http://en.wikipedia.org/wiki/Swinging
What is the percent for married couples to stay married for 70 years?
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Less than 5% of middle school couples get married.
12.3487394775649304% of married couples will be "forced"
There is a higher percentage of married couples in Midwest region
0 % who wouldn't want to screw
I could find no percentage statistics, but it is "hundreds of thousands" per year. From the number of married couples in the USA, we can infer that it's at least 2% of all couples, but that's a conservative estimate.
One third of couples who marry, meet online. Twenty two percent of those who did not meet online, met at work.
22% of married men have cheated on their wives and 14% of married women have cheated on their husbands, according to current data. The data is inaccurate, because most couples will not admit to cheating in the first place.
There is no such thing as illegally married gay couples. There are only legally married gay couples (with or without state recognition), and unmarried gay couples.
what percentage of marrages last more than 70 years