"Retardo Remedies Nature’s Mistakes" — or as the advertising copy of this attractive little mail-order sexual dysfunction remedy brochure has it,
"Science boldly points to the real cause! It admits that one of the strangest discrepancies in nature is the lack of perfect co-ordination between husband and wife at a time when nervous systems are strained to the utmost. It blames Nature for the over sensitive nerves of the husband which according to medical experts makes ninety percent of men, at one time or another, victims of prematurity."
Happily, Retardo “soothes and quiets over-sensitive nerves locally, for a period of 7 to 10 minutes. In fact, neither one is conscious of its action—and the other need not know of its use.”
(Though sexual intercourse is nowhere mentioned, this promotional piece from “Perfection Laboratories” is of course aimed squarely at men suffering from premature ejaculation.)