The flower behind one ear or the other, the keys on one hip or the other, the tattoo on one arm or the other.... The only problem with such secret signaling devices is that they only work if all parties know the code. And, of course, if all parties know the code, then it is no longer a secret signaling device. Maybe that risk is part of the thrill of having a secret identity. Suppose our young man in SF tattoos his left arm with a nice celtic pattern. He and his buddies think that it means "gay, passive, pagan". He then flies to Cincinatti for a conference, but that evening goes out on the town for a few drinks... where he discovers that celtic tattoos are only worn by terrorist hooligans of the IRA... and they aren't the least bit interested in his dating habits. Hmmm... at least the flower could be discarded or ring of keys could be moved if it ended up on the wrong hip for that part of the country! Tattoos tend to be pretty permanent. I found some nice tattoos using Google's image search. There were a few shops and catalogs, for further exploring if the representative image was good enough for a closer look. The labels didn't help with my main question, but the images were sometimes very intricate. Carolly