As for sex before marriage, there wouldn't be reference to it in the bible because in Jewish culture of the time there wasn't a question that sex before marriage was a bad thing.

Are you saying that no one had sex before marriage in Biblical times? Or are you saying that sex before marriage was already frowned throughout the whole Eastern Mediterranean so that Jesus, Paul et al didn't need to mention it ?

I'd don't buy it that on such a key area of human sexuality there would be no mention of it if it were outlawed by God.