1. You're the only one who has experience of living without parents
2. Responsibility
3. When they talk about Star Wars you're never 100% sure whether they mean the prequels or the True Trilogy
4. You get unflattering nicknames
5. Drinking
6. You sometimes feel like a dirty old man
7. They know nothing!
8. You feel old. Like all the time.
9.
Oh, and you don't get to make out with Julia Roberts. You lied to me Larry Crowne!