What's a secret? Sometimes it's information hidden from you because another person doesn't want to share, like your daughter not telling you about her new boyfriend, or your son not wanting to admit his test score.
Sometimes a secret is concealed because facts aren't available, as in "the secrets of the universe." Space missions, telescopes and probes haven't unlocked all there is to know.
Then there are secrets that are surprises: You think you know, but you really don't. For example, many people believe if you don't dress warmly enough in wintery or rainy weather, you'll catch a cold. It doesn't matter how chilly or wet you become, though; you can't get sick unless a virus invades your body.
Since this is true (and seemingly important), why is it a still a secret? In some cases, people simply haven't been exposed to the information. In other instances, however, some true believers have heard of the cold virus but reject it. They believe they know how colds get caught, and that's it. No need to investigate any further.
One area that is vulnerable to these last two types of secrets is human behavior. Scientists study it faithfully, but the information isn't always easy to interpret, and there's still a lot to learn. Also, since people are, well, human, they feel knowledgeable about behavior -- even when they're not.
Let's take a look at human secrets within a specific topic: the female mind. We promise we won't knowingly keep anything from you.