Evangelicals have long been known for their ability to sanctify popular culture for religious purposes. Popular culture’s obsession with sex is no exception, which raises an evangelistic question: How do we make the gospel winsome to a society steeped in sex? Our answer, according to a new book, has been to affirm that great sex in marriage testifies to the good news of the gospel. We sanctify sex, promising better sex when the Bible is the primary guide.