A new study led by Kristin Kramer of the University of Memphis shows that manipulating oxytocin at birth can make changes in the central nervous system that only show up later in life.

There's growing concern that the jolt of pitocin routinely used in U.S. hospital births could have unforeseen consequences. This study provides more ammunition. At the same time, it did not show that high doses of oxytocin interfere with social behavior later.

Why do some people quickly link up with mates who love them good and strong, while others gravitate to people who hurt them, dump them or withhold love?

It's all in the neurochemistry. I've come up with a metaphor that helps explain this painful syndrome.

When you're a little kid, you get used to your mom's spaghetti sauce; it's the one that tastes right, the one against which all other spaghetti sauces will be judged. (Please substitute latkes, baba ganoush, banh xeo or whatever; and for mom, use dad, another primary caregiver, or Boston Market.) When you leave home and get more experience, your tastes may broaden. But when you're a kid, it's the ONLY real spaghetti sauce.

Your parents take you out to a dinner at a fancy Italian bistro, and that spaghetti just sucks.