Oh sisterhood.
I have a good anecdote about that.
This one time, I got pissed in London after work and fell asleep in my burrito on the last train back to the sticks. I woke up just as the train was pulling out of my station at 1am and had to call my brother and ask him to pick me up from the next station.
Got off the train and was just wobbling towards the exit when a group of girls in their late teens jumped out at me from behind some bins. They yelled, "Aaaarggghh!", I yelled, "Aaaaaarrrghhh!" back, then they went, "Oh, SHIT, sorry, we thought you were our friend!"
So I pulled myself together and said in what my drunken self thought was a dignified tone, "It's alright, I probably did things like that when I was your age."
They squinted at me and then one of them said, "Huh, how old are you then?"
I replied, "I'm thirty-two."
They said, "NO!!!", their eyes wide with shock.
Then as I started to move towards the exit again, one of them said, "Wait! Don't go! Tell us all the things! What do you know now that you wish you'd known when you were our age?"
So I said, "Well...."
And fifteen minutes later my brother found me sitting on a bench on the station platform, guacamole all down my top, holding forth to a group of 18 year old girls about womanly things.