[Boomerang]

Maybe they don’t actually want souls, maybe their own souls are so twisted and corrupt that the proximity of good souls inflicts physical pain. The souls of innocents especially children inflict such agony that only the most powerful demons can approach near them. Demons and devils can alleviate their pain by separating souls from their physical body or corrupting good souls to evil. Achieving either task is much easier when they can approach lone individuals who are already partly comprised.