So I asked what the person looked like, and asked specifics, thinking of people who might come to the store looking for me. Apparently, this visitor was a tall male, mid-30s to early-40s, with light blond (possibly bleached) hair cut quite short, with no facial hair and pale white skin.
blinkblink. I can't think of anyone I know who fits that description. I can't think of any customers who look like that whom I've helped recently and who might have come in looking for me and only me, either.
I don't like mysteries!