The only part of the body scientifically proven to never lie.
This comes from a study done at the University of Leeds in the UK, where participants were surveyed about several aspects of their sexual behavior, including their number of sexual partners and the age they lost their virginity. Then, the researchers measured different aspects of the women's abdomens, including hip width, hip-to-waist ratio, and bootyliciousness quotient. The results indicated that the women who had racked up the most sexual partners also rated more highly with one-night stands, and on top of that, also tended to be the women with the widest hips. In fact, those for whom one-night stands accounted for the vast majority of their sexual encounters tended to have hips almost an inch wider than those who preferred long-term relationships.
"That's a lot of tape overlap. Sorry, I'm just not ready for this kind of commitment."
Now, sex science can be fuzzy at times (for instance, it always relies on self-reporting, so how do we know that curvy women aren't simply more likely to lie about one-night stands?), so do keep that in mind. But the theory is that women with wider hips have a lot less trouble passing those watermelon-sized, sexual side-effects we call babies, and so biology gives them the green light to go ahead and repopulate the next human generation. Women with narrower hips are inclined to be more sexually selective, because nature doesn't want you to go through that kind of pain if the father of your child is just going to be the lead singer of Nickelback or something.
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