Or, if not the origin, at least a volumey text where it’s reported to laypeople as medical fact.
I’m having a blast reading a dusty old copy of The Hygiene of Marriage, written by one Mr. Millard S. Everett, Ph.D. in 1932. There’s some wonderful sections in support of eugenics, as well as a whopper of a chapter on homosexually as arrested sexual development, and conditioning techniques to get yourself over your fondness for the same sex.
Anyhow, I just found this part, on a section discussing “venereal disease”, specifically, gonorrhea:
So it seems that our parents and grandparents weren’t smoking too much dope - they really *were *told by trained professionals that they might have gotten crotch rot from a dirty toilet seat!
Stay tuned for further installments, including two chapters’ worth of material on the topic of contraception without a single bit of information on the methods of the day, effectiveness or side effects - because federal law prohibited publishing information about birth control that could be sold across state lines.