Some mild kissing a couple of times.

At a party, a lot of teenagers are in swimwear.

None. No sex or nudity.

In a flashback, we are zoomed in on a girt getting beaten up.

There is a fight between two girls.

Teenagers push others around, trip them, bully them, etc.

Some slang terms, like slut, crap, etc.

A brick is thrown through a house window, and two people inside take cover.