Customer comes in asking for carburetor cleaner. Since I like classic cars, I asked him what vehicle he was going to use it on.
Customer: "It's not for a vehicle. I have a fever blister. I put carburetor cleaner on a fever blister and it dries it right up!"
Me: "Okayyy...We cannot be responsible for medical use of automotive products!"
I told my boss what the customer had said, and naturally he could top that story. My boss once had a customer come in to stock up on WD-40 when it was on sale. The customer volunteered the information that he and his wife were in the habit of using WD-40 as a "personal lubricant."
I sure hope that this customer was either lying or joking! Don't even think of trying this at home or anywhere else!