Incest is a sexual act that occurs between people who are related to each other by blood. Consent is usually not a factor. A brother and sister who choose to engage in an intimate encounter, for example, are committing incest because they share a close bloodline. In particular, brother-sister sibling incest is very common in society, and has been estimated at about % of the population. If these polls are accurate, that would indicate that over seven million Americans are or have been involved in some type of incestuous relationship. There is a sort of therapeutic prejudice and censorship going on