Dating rules for teens?

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D is the 18 year old girl who is dating a boy who just turned 17. They have been dating since last fall. We don’t really have “rules” for her/them, although I’ve said he should leave our house by 10 or so on work nights when we might start thinking about turning in. The boyfriend has a curfew and driving restrictions, but otherwise it’s not clear how many rules there are. Why do you feel that you need formal rules? I think we tend to be “cross that bridge when we come to it” type of people.</p>