....and other no brainers. But there's nothing wrong with a bit of evidence, and here it is.
"Our findings suggest that television may play a significant role in the high rates of teenage pregnancy in the US." According to Dr Chandra, hers is the first study to show such a direct link.
The researchers interviewed 2,000 adolescents aged 12 to 17 three times between 2001 and 2004. Teens who watched larger amounts of sexually charged TV shows were twice as likely to experience a pregnancy in the subsequent three years, compared with those with lower levels of exposure.
The study also noticed increased levels of sexual content on TV. "The message to parents is to talk to their kids about sex long before they become teenagers" and monitor their viewing habits. There is also a message to the TV channels, though nobody seems to be saying what that is for fear of being labelled as the next Mary Whitehouse.