Not every religion has to have St. Augustine's attitude to sex. Why even in our culture marriages are celebrated in a church, everyone present knows what is going to happen that night, but that doesn't prevent it being a religious ceremony.
Ludwig WittgensteinThe Christian religion is only for one who needs infinite help, therefore only for one who feels an infinite need. The whole planet cannot be in greater anguish than a single soul. The Christian faith - as I view it - is the refuge in this ultimate anguish. To whom it is given in this anguish to open his heart, instead of contracting it, accepts the means of salvation in his heart.
Ludwig Wittgenstein