Думаю иногда подсознательной склонностью к мазохизму. http://www.my-article.net/get/%D0%BD%D0%B0%D1%83%D0%BA%D0%B0/%D0%BF%D1%81%D0%B8%D1%85%D0%BE%D1%82%D0%B5%D1%80%D0%B0%D0%BF%D0%B8%D1%8F/%D0%BF%D1%81%D0%B8%D1%85%D0%BE%D0%B0%D0%BD%D0%B0%D0%BB%D0%B8%D0%B7/%D1%82%D1%80%D0%B0%D0%B2%D0%BC%D0%B0-%D1%83%D0%BD%D0%B8%D0%B6%D0%B5%D0%BD%D0%BD%D0%BE%D0%B3%D0%BE