as a teacher I can tell you this isnt a complete myth but it isnt as rampant as one would like to think, sure it happens but not to the scale that some moral majority, the world is going to hell in a handbasket types would like us to believe. Teenagers have been horny and doing all sorts of sexual expermenting for eons, check the stats the highest rates of teenage pregnancy in the US was during the Leave it to Beaver wholesome 1950's, I was talking to an old retired teacher and he says back in his day there were bets made by the guys on which girl would get pregnant before she graduated high school.