The therapist recommends the wife plays ring-toss on the man's *ahem* with doughnuts and then remove them orally. The couple tries it out and has great success. The husband is telling a friend about the remarkable turnaround and the great advice from the therapist.
The friend and his wife, having the same problem, go to the therapist. After examining the patients, the therapist says there's nothing she can do. The couple begs for help. Finally the therapist suggests the couple plays the same game,
Spoiler:

