The city that never sleeps

Hmmmm, just read that a new study says that New Yorkers have five times more sex than the national average. They have sex 156 times a year on average and have slept with more people than all other cities except Atlanta, admitting to an average of 25 lovers in their lifetime.
I'm just wondering if this was an accurate study. I've never been to NYC but have always heard how fast-paced the lifestyle is there, and am having a hard time understanding how New Yorkers even have time to sleep, much less have sex. But maybe the city attracts the go-getters, and they are doing just that.
Some things never cease to surprise me...