Etiquette
This post is from an adult to help you NEVER do this!
If you are invited to someone's house to eat lunch and hang out, never do this:
Eat before you go and then take one bite out of a slice of pizza, leave it in the dish, and say you'd like a doggie bag to take a couple of slices home...and a soda too.
When offered dessert, take a smidgen and just leave on a coffee table with your germy spoon still stuck in it.
Tell one of the people who invited you that they make too much noise when they eat.
Call your Dad on your cell phone just to chat.
Insult every movie that your host offers you to watch.
Invite your host for a one-on-one-sleepover after knowing them for about two weeks.
Act like you're 7 when you're 17.
If you've done these things, is it any wonder why nobody likes you?