proofs that I am getting older

I do think I am old.
Almost finished my university I am standing at the doorstep of my real life.. yeah getting older.
But for all those who have for sure an argument for me that the whole life is in front of me (I bet you are more then 24 :D I have 2 proofs that I am old.
I talked to 16 years old girls and they had to explain me what does it mean I like/I am EMO.
And second proof happened during my crazy summer, when I was taking part at some garden party and one 6 - 8 years old girl didn´t know how to dance to Macarena. She even doesn´t know the song.
Well yes I am getting older...