One of the goals of the Jedi Order is to foster greater understanding among the species of the galaxy. To that end, Jedi sometimes leave the order and live as part of another culture, often for years at a time, to learn its customs and study its languages. This cultural immersion follows a key tenet of Jedi diplomatic policy: To be reasonable, one must see all points of view.
Such immersion carries its dangers. Some Jedi have lost their lives undergoing rites of passage or by accidentally offending a rigidly polite alien society. The Jedi Order looks on these losses somberly as hard-earned lessons. However, most Jedi return with new skills and a fresh perspective on life. A few bring unusual habits or tastes, as well; after decades living in a Kubaz hive, for example, Master Arjur developed a craving for dried moon moths.