A good friend of mine's nephew was murdered. He's was never in to tattoos, but he decided he wanted one of his nephew's name.
He went to the tattoo shop and said, "I would like my nephew's name, Bernie Jr, tattooed around my left bicep."
The artist said, "Okay, no problem."
My friend said, "But I want it in binary computer code which is a series of zeros and ones, quite a few of them and there are enough of them to wrap around my arm."
The artist said, "Okay, but zeros are hard to do and still keep them consistent to look good, one after another."
Then my friend said, "Oh, and I want you to use flourescent ink that will only show up under a black light."
The artist said, "Let me get this straight. You want to pay for, and go through the pain of, a tattoo that no one can see and if they can see it, no one can read?"
My friend smiled and said, "Yep, you got it!"
I "saw" the tattoo for the first time a couple weeks ago. In regular light, you can barely even tell that it's there. One of these days, I'll have to see it under a black light.
Apparently you can get colored ink that can only be viewed under a black light. Hmmm. A Ruger logo on my left shoulder and a Ford Mustang emblem on my right!