"I remember a survey of teenage sex a few years ago, in which it was found that boys have sex all the time, girls practically never. The obvious conclusion was that there are some very busy young ladies out there." Guest/PMB
You may have that almost right. There used to be far fewer girls who engaged in teenage sex than now.
On the other hand, which one of the sexes do you think was more likely to lie about it? Today we often hear men confess that in their younger days they let their peers believe they were sexually active long before they actually were. *g*