@aredridel Some expectations are clearly laid out-- you are supposed to be monogamous, to form a nuclear family, have a good paying job, etc.
Some expectations are more insidious-- how do you start a conversation with someone you don't like? How do you handle a confrontation? What are you supposed to do when your broke and the bill collector keeps hounding you? Few people get taught what's expected in these situations, just tossed in, sink or swim.