For his most recent book, Sheet Music: Uncovering the Secrets of Sexual Intimacy in Marriage (Tyndale), psychologist Kevin Leman researched the sex lives of married Christians to find trends, concerns, and questions in a subject that Leman says Christians don't talk about enough.

Leman is author of The Birth Order Book and How to Make Your Children Mind Without Losing Yours. He also hosts a daily TV show called Reality Talks.

What difference do you see in how Christians treat sex compared to those outside the church?

When was the last time you heard a pastor get up and say, "I've got a 12-week series starting next Sunday on Song of Solomon"? You don't hear that because we have allowed the world to pervert the word sex.

By not talking about sex to our kids and not honoring it the way we should in marriage, everybody ends up paying. The average marriage today lasts seven years. It's been sort of fun to watch support build in the Christian community for Sheet Music. People are saying, "It's about time somebody tells people the truth."

With sex being so polluted by the world, how do we take it back as something pure and beautiful in marriage?

The way you do it is to make sure that you are each other's lover. You should go out of your way to entice your lover. Ladies, when was the last time you seduced your husband? When was the last time you met him at the door? When was the last time you took him on an overnight?

Gentlemen, when's the last time you set something up for your wife to go away by herself? I wrote an article years ago called "How to make love to your wife without ever setting foot in the bedroom." When you're at the store and you call and you say, "Honey, I'm at the store. Is there anything you want me to bring home?" ...