This notion of purity is present in many facets of Japanese culture, such as the focus it places on bathing. Purification is for instance regarded as important in preparation for the planting season, while performers of noh theatre undergo a purification rite before they carry out their performances. Among the things regarded as particular pollutants in Shinto are death, disease, witchcraft, the flaying alive of an animal, incest, bestiality, excrement, and blood associated with either menstruation or childbirth. To avoid "kegare", priests and other practitioners may engage in abstinence and avoid various activities prior to a festival or ritual.