Practice people skills: Firm handshake, introducing yourself, being courteous when encountering / being on receiving end of someone’s rude behavior, offering your seat (never sit while someone with gray hair, pregnant belly, any sort of injury or really anyone who is older or who works harder is standing.)
Anything can be an opportunity for you to grow if you approach it with the right mindset. “What can I learn” “How can I turn this into a way to advance my goals?” I know, it’s kinda corny but it’s true. Your attitude is everything.
Talk about how choices become habits. Habits can become addictions. Describe how pathways are literally dug into the brain and it's very hard to change them once those paths are made.
Drunken shenanigans are part of life when you’re in college, etc. but it gets old fast.
That kind of behavior as an adult is just sad. Drink responsibly. Don’t make an $@!#% out of yourself. I recommend this rule: Don’t have more than one drink at a work function.
Sex: There's no single way to do it "right" but there are lots of ways to do it wrong. Not being respectful and tender towards your partner is usually at the root of "wrong" ways to do it. Also, there is no rush. You may think all your friends are "doing it." They're not. Take your time.