L o v e ,  S e x  &  H e a l t h
The Power of Love
How does our love life shape us—mind, body and soul? Let us count the ways
By Jeffrey Kluger

January 19, 2004 Health

	photo essay
	Animal Attraction There's more than one way to make hay, as birds, bees and bonobos know
	graphic
	Where Our Sex Drive Comes From Mapping the origins of sex drive on the human body
	remedies
	Love Potions A guide to some of the medical treatments available for what ails our libidos
	self-test
	The Passionate Love Scale Determine just how you feel about that special (or ex-special) someone

One thing you can say about lust, it sure shows up early. Talk all you want about the honey-sweet face of an innocent newborn, the fact is, from the moment we appear in the world, we're not much more than squalling balls of passion. Our needs aren't many: to sleep, to eat, to be held, to be changed. Satisfy these, and there won't be any trouble. Fail to, and you will hear about it.

Of all the urges that drive us, it's the passion to be held that makes itself known first. If a baby is startled fresh from the womb, German pediatrician Ernst Moro discovered in 1918, its arms will fly up and out, then come together in a desperate clutch. Holding is good, and floating free is bad—a lesson that's not so much learned after birth as preloaded at the factory. In fact, doctors have long known that babies who aren't held simply fail to thrive. Not surprisingly, it's a need we never outgrow. In one way or another, we spend the rest of our lives in a sort of sustained Moro clinch.

Physical contact—the feeling of skin on skin, the tickle of hair on face, the intimate scent drawn in by nose pressed to neck—is one of the most precious, priceless things Homo sapiens can offer one another. Mothers and their babies share it one way, friends and siblings share it another, teams and crowds in a celebratory scrum share it a third. And of course lovers share it in the most complex way of all.

Of all the splendidly ridiculous, transcendently fulfilling things humans do, it's sex—with its countless permutations of practices and partners—that most confounds understanding. What in the world are we doing? Why in the world are we so consumed by it? The impulse to procreate may lie at the heart of sex, but like the impulse to nourish ourselves, it is merely the starting point for an astonishingly varied banquet. Bursting from our sexual center is a whole spangle of other things—art, song, romance, obsession, rapture, sorrow, companionship, love, even violence and criminality—all playing an enormous role in everything from our physical health to our emotional health to our politics, our communities, our very life spans.

Why should this be so? Did nature simply overload us in the mating department, hot-wiring us for the sex that is so central to the survival of the species, and never mind the sometimes sloppy consequences? Or is there something smarter and subtler at work, some larger interplay among sexuality, life and what it means to be human? Can evolution program for poetry, or does it simply want children?

If there's indeed much more than babies involved in the reasons for sex, we're clearly not the first species to benefit from that fact. Even among the nonhuman orders, sex appears to be regularly practiced for a whole range of nonreproductive reasons with a wide range of community-building benefits. How else to explain the fact that homosexual behavior occurs in more than 450 species? How else to explain kissing among bonobos, nuzzling among zebras, literal necking among male giraffes? How else to explain the fact that some sexually active animals seem to avoid reproduction quite deliberately, mating at times that are unlikely to produce young or picking partners that are unable to do so? From 80% to 95% of a species of sea lion rarely or never reproduce, though they continue to couple. And so of course do many of us, chasing sex as passionately as the most prolific of breeders.

"How many times in your life do you think about being sexual," asks clinical psychologist Joanne Marrow of California State University, Sacramento, "and how many of those times are you thinking about reproduction?"

So what gives? And don't say simply that sex is fun. So are gardening and traveling and going to the movies, but when was the last time you woke up in the middle of the night with your heart pounding and your breath catching because of a dream you were having about a trip to Barcelona? Just as there's more to sex than babies, there's also more to it than fun.

Part of what makes touch—and by extension, sex—such a central part of the species software is that hedonism simply makes good Darwinian sense. It's not for nothing that hot stoves hurt and caresses feel nice, and we learn early on to distinguish between the two. "All creatures do things that feel good and avoid things that feel bad," says J. Gayle Beck, professor of psychology at the University of Buffalo. "The individuals who learn that best live the longest."

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