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Went to the drugstore around the corner to pick up some shaving stuff and a Chapstick. As I was checking out, the clerk behind the counter, a woman I didn't recognize, asked, "So, do you play the guitar?"

For a moment there, I was stunned. Why would she ask that? Wow!

Then I realized the T-shirt I wore was from the Clapton concert, and had a big picture of a strat on the front. 

Duh ...