Kissing is not just kissing. It is a major escalation or de-escalation point in a powerful process of mate choice.

Women have a better sense of smell than men do, and it's even sharper in the middle of their menstrual cycle, when estrogen levels peak and women are more likely to be deciding whether a man's attractive.

Men don't need linguistic talent; they just need courage and words.

You size up someone physically in less than one second - too tall, too short, too fat, too thin, too old, too young, too stuffy, too scruffy.

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

Mothers really were not built to raise babies not only by themselves, but with only a partner. For millions of years, a woman had much more than just her husband to help rear her young... This whole idea of 'it takes a village to raise a child' is exactly how we're supposed to live.

Office romances are few, short, and not usually destructive.