I have been really, deeply shocked by what a lot of kids get up to, especially at parties, and what many (most?) parents seem to endorse or at least turn a blind eye to. I worry a lot about the future mental health of teenagers having multiple partners at a young age, under the influence of alcohol, and I think it is really sad that it seems 'normal' now for this kind of thing to go on. Several close friends of mine have had distressed calls from teenagers saying 'get me out of here quick' from parties which have turned into the kind of thing which reminds one of the last days of the Roman Empire!
I am so out of step! But it doesn't stop me wishing that our young people could be spared all this additional pressure. While parents are willing to allow a whole houseful of kids to 'get changed before a party ' (ie 'preload' with alcohol) and sleepover at each other's houses after it (often sh***ing several others while they are there), I fear it won't change. Poor kids. And poor parents like me who want to run away to a desert island when I hear about it.
Don't go thinking any school is exempt, either. Private, grammar, actually I think they are almost worse than the special measures place I teach in, where there is still a kind of naïveté, albeit also troubling, which is absent from some of the very knowing girls of my DD's acquaintance. Scary. Once they are at uni, fine, but while they live in my house, nope.
Eta - sorry, Nada, that turned into a rant and contains nothing of any practical use to you. I would just say this - teenagers like boundaries and test them frequently to check that they are still there. If you don't like the language, keep saying so and keep those boundaries right where they are. Your home, your standards. But yeah, keep the lines of communication open too.