Columbia subject headings:
Harvard subject headings:
Food--History
Health reformers--United States--History.
Masturbation--History.
Natural foods--History.
Paraphilias
Physical fitness--United States--History.
Sex (Biology)--Nutritional aspects--History.
Sex (Psychology)--History.
Sex customs--History
Sex instruction--History.
Sex--History
Sexual ethics--History
Sexual health--History.
Princeton subject headings:
Natural foods--History.
Sexual ethics.
Sexual health--History.