"If A, then B," is what we were taught. If you are pure — non-sexual to whatever extent is the requirement — before marriage, then you will have a perfect, blissful highly sexual life after marriage. You will please your husband. He will never leave you. He will never cheat on you, because you will be such a sexual delight for him.
And it's fascinating, because this teaching doesn't really work. The reality that I've learned from my interviews in particular is that, "If A, then A." If you learn to shut down your sexuality, if you learn to train your body to experience shame to protect you from the consequences of your sexuality, in your community, "then A" — after you get married you often still struggle with turning your sexuality on.