We have two boys, two girls. The girls were easier. My DH always told them they could start dating as soon as they were married.
I love the teenage years! The first two are in their 20s now, but we still have a 17 and 19 year old. They are just trying to become independent. You want that - that means eventual freedom for you. I love watching them become their own person and enjoy the great conversation you can have with them now that they have their own informed opinions.