Nudity
For a thousand years after the fall of the Roman Empire, proper behavior in Europe was defined by the Catholic Church. The church disapproved of sexual behavior outside of marriage, but was more tolerant of nudity than other Abrahamic religions. Sexual segregation was expected, but not required. Everyone other than the upper classes lived in close quarters and had more tolerance for functional nudity, sleeping and bathing without privacy. Until the Carolingian era Christians were baptized naked to show that they emerged without sin. Small groups of Christians held worship services in the nude, reclaiming the innocence of man before the fall.