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Have a cold? Try a minipoo. (1948)
(thelemmy.club)
This brand still existed into the 1970's, advertising under the same name! I assume in the 1940's, the modern slang was not in common use. Some word origin sites say "poo" arose in the 1950's. By the 1970's, this branding must have become problematic!
Nothing wrong with the product, as far as I know. Similar dry shampoos can be purchased today, under rather different branding.
Am I... not supposed to use shampoo when I have a cold? Or is that just marketing capitalizing on folk beliefs?
Haha I wondered that too! I have always showered and shampooed even with colds, and I feel like nothing grisly came of it. I was not beset by shampoo modified horror viruses.
But maybe there is a reason, and nobody told us of it.
I do know that some people say that you will catch a cold if you go to bed with wet hair, maybe it's related.
Sounds like a good guess to me. I bet it's something like that.
I guess feeling cold doesn't directly make you catch a cold, but it can stress your immune system, which weakens your defenses vs the virus. Maybe they had similar ideas about wet hair. Nevermind that you'd already have the virus when using the minipoo in the ad's scenario, heh.
I think the idea is avoiding a wet head for a prolonged period.