What I've noticed from reading this is that jews are much more open and interested in studying incest that occurs between a mother and son. In their research they point out this model created by White people (though not specifically singling out Whites) of an authoritarian father and young daughter precludes from it the prevalence of mother-son incest, which they say is much more common than is typically thought, though it's still most likely the least common form of incest. I wondered what the prevalence of mother-son incest is among jews. If during times of persecution jews were forced into close confines with their parents there may have been "sexual preoccupations" between the opposing sexes of the parents and children. I've also heard that jews have very overbearing mothers, which was another behavior that this paper cited as being one among a subset of mothers that committed incest with their sons.