How to feel OLD in one coffee or less

I had a great afternoon in Edmonton today. An old friend called up and announced they were in town on business and asked if I had time to meet for a coffee this afternoon.
We had a wonderful conversation, although we've talked on the phone and on Facebook quite often in the past few years it's actually been years since we've met in person.
Eventually the topic turned to registering his daughter in kindergarten, the applications for the process have to be in by the end of the month. Now I need to mention his daughter is almost exactly a year older than Nathan, so they are very similar in age.
But when I felt about the oldest I've ever felt was when he reminded me that WE HAD MET in KINDERGARTEN- And therefore had KNOWN EACH OTHER 25 Years now!!!!!
I nearly died
25 years
and we were almost our children's age when we met?
How did I possible get this old?