People buy
a lot of books
about sex.

They may not always want to talk about it, but they sure have a lot of questions. It’s one of the most common marriage issues, responsible for heartache, dissatisfaction, and distance. In fact, over 79% of couples are mismatched in expectations about frequency alone. 

And we are all curious.

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In the largest nationally-representative study ever conducted with married couples about sex, relationship researcher Shaunti Feldhahn and renowned sex therapist Dr. Michael Sytsma uncover the most important urgent sex-related issues for the average married couple–and give you workable solutions and lasting hope.


Full of fascinating insights, biblical truth, and straightforward, practical advice, this is more than just a field guide to good, mutually satisfying sex. It’s the map to intimately understand your spouse and create the marriage you’ve always wanted.

“Intimacy is such an important part of a marital union. Fully researched and biblically sound, Secrets of Sex and Marriage is a great tool for any married couple to read together and grow closer in their intimate life. I highly recommend this insightful book to all married couples.”

Gary Chapman, PhD,

author of The 5 Love Languages

“Michael and Shaunti wonderfully blend helpful information validated by research with practical application.” 

Dr. Clifford and Joyce Penner

certified sex therapists; authors of The Gift of Sex

Let’s Talk about Sex

Feldhahn is a renowned researcher and bestselling author with more than 3 million copies of her books sold in 26 languages. Sytsma is a nationally respected sex therapist and licensed counselor. 

Combining groundbreaking original research with more than 35 years of counseling experience, Secrets of Sex and Marriage identifies eight simple, transformational factors to help you move from disconnection to delight.