No, keeping someone else's mail is an offense with the US Postal Service.
Yes, someone is legal. Someone is not legal, too. It's weird how things work out like that sometimes.
That's illegal. It can get to the point where you can get sent to jail
yes; freedom of speech/actions
If it isn't legal, then you don't date them,I am assuming it's age that stands in the way, and I beg you to not make a mistake and do something that could alter the rest of your life.