My eldest boy is 13 in January. He swears blind he will never smoke (as I do) as its disgusting, and he doesnt like to see people drunk as they are embarrasing.
Much as I admire his stance on the subject, and have told him so I have no doubt he will experiment, as his friends will as its what teenagers do, fact. I dont think any parent could catagorically say theirs wont do these things, you cant be blind to the fact that other kids will and your kids will see it and want to “fit in” and this is where the problems start.
On the subject of perverts, there are many different scenarios:
What about a 14 year old girl and a 30 year old Teacher: he is in a position of trust and the pupil must be protected by law.
A 14 year old girl and an 18 year old boy in a relationship: her Dad will probably hate it, but the guy is not a perv.
A guy who persistantly chases younger girls: perv
Young girls lying to guys about their ages: Slappers.