10 Sex Facts You Need to Know

By Lucy Danziger and the staff at SELF

Because you’ve heard what they say: Knowledge is pleasure, er, power.

1. You might want to hit the gym before you hit the sheets. Getting just 20 minutes of cardio exercise can increase genital arousal in women, researchers at the University of Texas in Austin have found. But maybe shower between heart-pumping sessions?
2. Yep, size matters for women, too. A study in The Journal of Sexual Medicineshows that the clitoris becomes 15 to 20 percent larger on the 14th day of your cycle, thanks to the extra blood flow, making the spot even more sensitive.