Senior Discount

I went to the local zoo on a weekday. Couldn't believe how expensive it was to get in. I asked if there were anything cheaper than the senior discount and was told that there was not.
Reluctantly I had asked for the senior discount and handed the clerk my credit card.
She asked me for my ID.
"How nice," I said, "to need to verify the age."
"Oh, it's not that," mechanically replied. "I need to verify that you are the person who belongs to the credit card. You would be surprised how many old people try to scam us here."
Good for her I'm not in the habit of b**** slapping anyone