People regarded as modern-day Osu in Igboland are descendants of individuals who volunteered and were sacrificed to the various gods. These fore-fathers pledged themselves and their descendants to these gods. They enjoyed protection and privileges but were segregated from ordinary folks. These Osu people married, fraternized and socialized among themselves. The practice continued to this day. An ordinary Igbo person would not marry or permit any of his relations to marry an Osu person. In a few instances where that has happened, every member of that non-Osu who married an Osu became infested and were regarded as Osu.