Anal sex doesn't appear very often as a heterosexual practice.However, it seems to be common sexual practice among primitive cultures.

Anal sex is the introduction of the penis in the anus, as much in the heterosexual relations, as in the homosexuals. Called also sodomy - derived from Sodom, mythical city next to Gomorra destroyed by God due to its sexual immorality.

Anal sex was considered against nature once, by religious tradition, the only sex considered natural was with reproductive purposes.

Anal sex practice inmany countries is described as if it was something for strange people: French call anal sex the "English vice" and English call it "French vice", the Arabs of the "Persian vice" and viceversa.

Anal Sex in many situations this practice was used to preserve - hypocritically the virginity and to avoid undesired pregnancies.