A man visits a tattoo parlor with a rather simple, but strange request. He requests a short, straight line tattooed on his upper arm.
Once the first tattoo heals, he returns, asking for another, exactly the same as the first.
After a few more visits, it becomes clear to the tattoo artist that he’s tattooing tally marks on the customer’s arm.
Curiosity getting the better of the tattoo artist, he asks, “What are you counting?”
The man answers, “How many tattoos I have.”