Pastor Ed Young and his wife, Lisa, climbed to the rooftop of their Texas church last week and staged a 24-hour bed-in. Their aim was to encourage other married couples to undertake seven straight days of sex, all in the name of the Lord — and to promote their new book.

There was no nudity, and certainly no nookie, during the webcast stunt, but it nonetheless got the pair on CNN and earned invaluable advertising for “Sexperiment: 7 Days to Lasting Intimacy With Your Spouse.” It’s the second Christian “sex advice” book to be lavished with attention this month for allegedly being edgy and oh so sexy. “Real Marriage: The Truth About Sex, Friendship, and Life Together,” written by pastor Mark Driscoll of Seattle’s...