A new study suggests a link between teenage sexual activity and the television shows kids watch. Researchers have found those who watched a lot of TV with sexual content were about twice as likely to start having intercourse during the subsequent year as those with little exposure to televised sex. Researchers surveyed nearly two-thousand adolescents in 2001 and again in 2002. Kids were asked how often they watched 23 popular shows heavy in sexual content and whether they engaged in various sexual activities. A scientist with the Rand Corporation says sex on TV rarely deals with negative aspects most teens aren't prepared to deal with, including unwanted pregnancy and sexually transmitted diseases. A Viacom spokesman says TV is just "one of many factors that influence young people's lives." The study is in the September issue of Pediatrics.