Is There a Tattoo of Anything, but Only I Can See It?

I wanted to ask you kind of an odd question here, but I figured I'd throw it in maybe it'll get you to think a little bit Is if you could get a tattoo of anything, but you are the only one who could see it. What would it say? "This is what I learned and Does this make sense to you right so yeah That makes complete sense to me at least that's the goal"