The average age of first sexual intercourse in the US is ~17 for both boys and girls, and rising. The hypersexuality of adolescents is overstated in popular media, though probably varies by region. I grew up in a pretty promiscuous environment, and even there, while there were 13-year-olds having sex, and we were aware of it, that was by far the minority experience.
And minority experiences are not allowed? How would that be any different from "5% of the population is gay, so we're just not going to allow that to be talked about"?