We're not very dangerous animals; we don't have a horn like a rhino or quills like a porcupine.

In courtship, who wins and who loses will determine who passes on their DNA to tomorrow.

If two very different people pool their DNA, they'll create more genetic variety, and their young will come to the job of parenting with a wider array of skills.

My hypothesis is that conservative Republicans have very clear values, and when you have that, you're simply more relaxed.

A Rolex watch or an expensive car are the things guys often use to show status, wealth, and basic desirability.

Hair that gleams can send a clear sign that you're young and in your prime, whatever your actual age.

I've always maintained that men were more romantic than women.