When did it become poplar to shave public hair?

Anonymous
The norm now is to shave public hair, whereas in the 90s I think it was landing strip for girls and trimmed for guys, and obviously (judging by pics) the 70s was a "let it go" time.
So when did it change to shave it off? Who made that popular and how did it start into this level of societial acceptability?
When did it become poplar to shave public hair?
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