When I was a kid, there was an old joke that the difference between a good girl and a nice girl was that good girls swallow it, but nice girls spit it out.
With no knowledge of the past, today's teens are vexed by much the same question.
Here is how today's teenagers cope with this problem: Teen-Agers Alter Sexual Practices, Thinking Risks Will Be Avoided.
However, this time the Times has got me beat!: This Joke (really two jokes) was actually published in the New York Times.