What’s the purpose of the husband when he first studied the skills of stealing?

M: Hey, Linda, you won’t believe this, but here is an article about a professional pickpocket Bob Arno and his wife travel the world to learn the fundamentals of stealing.
F: Are they crazy? Don’t they know that is breaking the law to steal?
M: But they didn’t do this in order to steal. At first, the husband, Bob, studied to improve his skills as an onstage pickpocket performer, and that is how he has made his living for most of his life.
F: Where has he been to give performances?
M: He started as a stage pickpocket in his native Sweden, and then entertained troops in Southeast Asia during the Vietnam War. He became so skillful that the trade eventually led to him to a career performing at nearly every major Strip hotel as an entertainer.
F: This is really a strange profession. Is he going to do this kind of performance all his life?
M: No. Actually, he studies with the goal of documenting the artistic form of thievery that dates back almost to the beginning of time. He and his wife are in the process of putting together a book on all of the different pickpocket skills.
F: I guess they hope that through their studies and the upcoming book, they can inform others on how to avoid becoming victims?
M: That’s right.
F: Have they given any advice on how to prevent being stolen from?
M: The simplest advice he offers is to be aware and to keep a wallet in a safe place, preferably in a pouch underneath clothing.
F: I think it: it’s common sense.
M: But people tend to neglect it, especially when they are on vacation. He also suggests people should move at a fast pace, and act like you have a purpose. If you look confused, the pickpocket will sense that in a second and they will be all over you.
F: That quite makes sense.