Even the most jaded teen with purple and black dyed hair, all black skull clothes and a big fat pout on her snout can still go "aaaawwwww" at my cute dog, with her Dad, in public.
Teenagers live in an alternate universe where it makes sense to be the last to take something out of a trunk and forget to close it; where being asked if your towel is dry has nothing to do with the fact that it is the towel you need for swimming and should be put into your bag for the day.
They also live in a universe that notices that the Universal Declaration of Human Rights does not allow for gay marriage, maybe....the book we have here says, "All men and women have the right to get married and start a family, once they've reached a certain age. It doesn't matter what race, nationality or religion they are. A man and a woman can only get married if they both want to."
Now, it doesn't actually say that men cannot marry men, and women cannot marry women, but it does imply heterosexual marriage.
Maybe teens live in a universe where they are looking at the big picture and not really sweating the details. Their Moms and Dads are still around enough to keep the ants/rats/pestilence away when they never do dishes, and to make sure they have the towels for swimming, so they get to focus on the good stuff.
Like the Universal Declaration of Human Rights.
Teens are pretty cool.
They are also just a little bit weird.