Luanne becomes a born-again virgin, which inspires Peggy to confess a sexual secret
After being dumped by yet another boyfriend, Luanne is despondent. Hank has her meet with the minister, who suggests that Luanne become a born-again virgin. All she has to do is attend a virgin support group, go through a revirginizing ceremony and promise to remain celibate until she gets married. Luanne agrees, and Hank and Peggy agree to sponsor her.
In their first therapy session, the men and women are separated and must divulge the amount of sexual partners they have had. Hank is proud to say that he and Peggy lost their virginities to each other on their wedding night. Meanwhile, over in the women's group, Peggy confesses that she slept with one other man before she married Hank - but only to help him figure out whether or not he was gay (he was).
Later, Hank sets Luanne up with Rhett, a virgin from his group. Rhett becomes so consumed with the desire to sleep with Luanne that he proposes - and she accepts. When Peggy protests, Luanne spills Peggy's secret to Hank. Outraged, Hank temporarily moves in with Luanne and helps plan the wedding. Peggy is so upset that she can't sleep, and sees Luanne sneaking out of her bedroom window. She calls Hank and the two of them catch Luanne and Rhett in the back of Rhett's van. Peggy gives an impassioned speech explaining that you can't marry someone just to sleep with him - if she'd done that, she'd never met the love her life, Mr. Hank Hill.
The day of Luanne's wedding, Hank arrives at the lake to find that the wedding's been cancelled. Instead, Peggy is going through her own revirginizing ceremony. She is dunked in the lake by the minister and "reborn" a virgin. Hank is so turned on by the sight of his wife in a clingy, wet robe, that all is forgiven.