Teenagers today do seem as interested in horizontal sports as when long ago and just within memory I was.
It is an important thing that we realise that to protect all our children then, as Rindy has already suggested that they are encouraged to put safety first, a difficult thing with all those hormones flowing through young and healthy bodies, after all nature is set against abstinence it wants them to breed. It isn't a case of promiscuity therefore it is our responsibility to encourage them to act responsibly, difficult for both parties when,
a/ It's embarrassing trying to tell your children not to do what you wanted to do when you were their age.
b/ They do actually at that age feel invulnerable to any thoughts of death and disease affecting them and lets face it when we were their age we thought it was our generation that invented sex, buried our heads in the ground at the thought that our parents could possibly have had as much enjoyment at that age.
So on and on goes the cycle, it is our turn to wring our hands and worry and their turn to grasp at life and it's joys.
Without becoming strict and locking up our daughters (an impossible task, ever tried to keep a cat on heat in the house? They have ways of escaping from your best efforts just when you think you can relax).
Encouraging pride in themselves without being too critical when they show their natural failings would be a big help but just as difficult, they will always listen to and mimic their peers before they will allow themselves to learn from our nagging, erm, experience.
All We can say to these young experimenters is:-
Please remember it is your life you won't get another one to live, so whenever possible please take care of yourself, and have some respect for your own and your partners body learn to practice safe sex, that way one day you can sit at a keyboard somewhere worrying about what your children are up to.