Via an email from Kevin comes this (see also this and this):

The advice appears in leaflets circulated to parents, teachers and youth workers and is meant to update sex education by telling students about the benefits of enjoyable sex.

…

Entitled Pleasure, the leaflet has been drawn up by NHS Sheffield, but it also being circulated outside the city.

The leaflet carries the slogan “an orgasm a day keeps the doctor away”. It also says: “Health promotion experts advocate five portions of fruit and veg a day and 30 minutes’ physical activity three times a week. What about sex or masturbation twice a week?”

Ho, hum. That has been Dr. Joe’s cure for everything for over 30 years. Just ask Barb.