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So, OKCupid is an online dating site, 3 million users, blah blah blah. They collected data, they made a study. It has graphs and charts and lots of info. Its an easy read, check it out.
I'm not going to copy over any info, I'll let you guys make your own conclusions. This is to provide a bit of a larger perspective on an issue that's getting discussed on NS a lot lately.