Nothing wrong with sex. Contraception and prophylaxis are wise.

Nothing wrong with provocative dress (but uniforms are useful to avoid social distinctions - T-shirts and denim jeans and denim jackets, length unrestricted would be a good uniform: I'd suggest some sort of compulsory shoe for foot health and avoidance of expensive-trainer-madness).

Not a lot wrong with alcohol either. You do realise that in France it is normal for children to drink (weakened) alcohol from about the age of ten, don't you? Drinking from about 10 am however is pretty stupid.

We got rid of most puritans when William and Mary came back by invitation.