As seniors throughout the nation prepare to graduate this spring, they are cramming for finals, finishing theses, and saying goodbye to friends. At many colleges, they are also looking forward to participating in graduation rituals--and scrambling to complete lists of things they must do before they leave their campuses behind. These rites of passage involve symbol and metaphor, art and vandalism, sex and nudity. Some are lighthearted, and some are illegal. In this article, "The Chronicle" presents a roundup of graduation traditions both official and unofficial.