What do you mean by western culture? The sex and immorality problem is worldwide. I hear that in Russia, they are encouraged to imitate the decadence of America, and that immorality and alcoholism are out of control.
By Western culture, I mean those countries/cultures whose social structure has been built around Roman Catholicism or Protestantism, and therefore their sexual "norm" has largely been dictated by the so-called Augustinian ideal (in which sex is tainted and all inherit guilt from our forefather Adam). In those countries whose culture was inherited from the British Empire, it is referred to as Victorian sexuality, and in America we commonly use the term Puritan (or Puritanical).
I hear similar things about Russia, and their divorce rate and abortion rate are symptomatic of the same issue. I have found a tremendous amount of comfort and freedom in the stand of the Russian Church Outside of Russia.
In America (and I would assume Canada and Australia as well), there are large numbers of convert Orthodox who bring "baggage" into their Orthodox life from their Protestant or Roman Catholic upbringing which tends to cause difficulty in certain areas of life. Sexuality is one big area, but certainly not the only one. There are also common problems including respect of authority within the Church, strong tendencies to control Church activities through a "lay council," and syncretism. On the flip side, converts tend to see financial support of the Church as a priority.
I am very open to comments or corrections on these observations. I am glad there is a dialog here on the subject.