When necessary physicians, surgeons and pathologists download information about patients' species into their minds from "Educator tapes", recordings of the memories of great practitioners in the appropriate species. However, in addition to medical knowledge, the educator tapes also capture the personalities of the medical experts who recorded them. Thus having an educator tape active threatens the recipient with multiple personality disorder. The new personality is from a vastly different species, often with very different behavior codes and sexual preferences, and, to make matters worse, the donors were often very dominant personalities. The mildest symptom of such conflicts is a running gag in which users of these tapes are often seen in the Sector General's cafeteria, eating a bland-looking sandwich with closed eyes. On the other hand, the risk of finding members of other species sexually attractive is a serious concern.