Someone made a map of who slept with who at a high school. Very interesting. And not exactly what they expected to find. Some bits from the article:

"The results showed that, unlike many adult networks, there was no core group of very sexually active people at the high school. There were not many students who had many partners... But they were indirectly linked, partner to partner to partner. One component of the network linked 288 students – more than half of those who were romantically active at the school – in one long chain."

Which has implications for STD prevention:

In adult populations, in which there are cores of sexually active people who are the main conduits of disease, you can focus education and other efforts to this select group.

Hmm, that sounds familiar... Oh, I know -- that's the only kind of HIV prevention education the CDC will approve funding for! The kind that's targeted to a small core of high-risk individuals.

But in the case of adolescents, “there aren’t any hubs to target, so you have to focus on broad-based interventions,” Moody said. “You can’t just focus on a small group.”

Oh, and this is somebody's random art project, that I think is pretty cool.