Sex studies: Blushworthy headlines of 2013

The worst stereotypes of science suggest that it's boring, staid, or overly complex.

Not these studies. More often than people may think, science gets downright dirty, peering into bedrooms and asking nosy questions about secret fantasies. The science of sex is anything but dull.

With that in mind, here are 10 of the sex stories most likely to have caused blushing in 2013.

1. More housework, less sex?

2. After baby, women wait

3. So do dads

4. Sex for headache relief

5. Bats have oral sex

6. Hookup culture isn't so wild

7. Sex as exercise?

8. Hookups don't lead to orgasm for women

9. How hormones influence sex

10. Male birth control blocks sperm