Both sexes like the exercise and challenge of sports, but for men it's also a basic display behavior for impressing and winning a mate.
Psychologists maintain that the dizzying feeling of intense romantic love lasts only about 18 months to - at best - three years.
Women apparently are quite drawn to men who have differences rather than similarities in their histocompatibility system. They pick it up by smell, and they can pick it up from kissing.
Scientists know that women gravitate to men who have a different immune system from theirs.
Good-looking people are always looking for other good-looking people.
Why do we feel jealousy? Therapists often regard the demon as a scar of childhood trauma or a symptom of a psychological problem. And it's true that people who feel inadequate, insecure, or overly dependent tend to be more jealous than others.
For so many generations, a woman's only career path was to marry well and to marry up. Those days have changed.
When you massage someone, the levels of oxytocin go up in the brain, and oxytocin is one of the chemicals that drives attachment.
Men couldn't care less if your strands are perfectly styled and neat. In fact, he might like you more with some wildness or bedhead, since it shows you're carefree and relaxed.
The women's movement is just a symptom of basic changes in the economy that are favoring women.
There are cognitive processes and limbic reactions associated with basic emotions. And you can change brain chemistry, but you're still not going to change memories and experiences in a human being.
People have been looking for love potions since hunter-gatherer societies.
Office romances are few, short, and not usually destructive.
Young women today do not marry the men they met in high school, or even the one they go out with at college, because they do not need to.
You can really get poked in the back and not feel it very much, but just a feather around your lips and you really do feel it.
I think you will find that with divorce will come happier remarriages.
Real competition can drive up testosterone, which boosts libido.
In America, we are demanding everything from our marriage.
People compose poetry, novels, sitcoms - for love.
I have always been interested in how you can walk into a room and there will be 40 people there and you are immediately drawn to one.
There is more and more data indicating that there is a biological basis to your political views.
You can be instantly scared. You can be instantly happy. So why can't you be instantly romantically in love? I think when it happens, it's because you are ready to fall in love.
It certainly would have been adaptive for ancestral man to have a chubby wife during stressful times of famine. Not only would she have had more calories to burn, and thus more energy and endurance, but since fat stores estrogen, she would have remained fertile for longer.
Liberals and conservatives are looking for entirely different things. Their attitudes toward romance and how they court are really dramatically different. There's almost no overlap.
There's biology in everything, even when you're feeling spiritual.
Men fall in love faster than, and just as often as, women.
The human brain is built to compare; it's Darwinian to consider an alternative when one presents itself.
You fall in love with somebody who fits within what I call your 'love map,' an unconscious list of traits that you build in childhood as you grow up. And I also think that you gravitate to certain people, actually, with somewhat complementary brain systems.
We spend our lives trying to get along with people so we can keep our jobs, keep our marriages together, so that we can raise our kids properly.
People have often asked me whether what I know about love has spoiled it for me. And I just simply say, 'Hardly.' You can know every single ingredient in a piece of chocolate cake, and then when you sit down and eat that cake, you can still feel that joy.
Since when is anyone truly honest with anyone?
Hair that looks like it's been naturally sun-bleached makes you seem youthful, like you spend a lot of time outdoors. And that appeals to most people.
We all have restlessness in long-term relationships.
Despite the myth that men are less committed, they are predisposed to desire marriage.