There are moments that in life when the realization suddenly hits you that you may be aging. I was talking to a 20-something recently about plans for the upcoming TEDxIBYork conference. Should we have a stash of markers available for people to identify their gift bags? I pointed out that this might create a traffic jam, and why not let people use their own pens? He seemed rather stunned that I would think anyone was likely to carry a pen with them. "It's probably an age thing", he gently pointed out.