To be truthful, I'm not 100% certain about this.
Doesn't really sound like a good idea then does it!
Coffeeking, I think what your friend was trying to say was that her tattoos are a trigger to memories. Mine certainly is because it represents the best years of my life so far. Every time I look at it it makes me happy, and I've looked at it thousands of times. IMO, that makes it the best £50 I've ever spent :)Of course for you it just looks like a picture and means nothing.
Your comment that all tattoo's are tramp stamps does you no credit really, although I'm guessing it was a troll designed to get the debate going.