In the US being clean shaven became popular after troops returned as heroes from WWI–they had been required to shave so gas masks would securely fit.
Shaving your legs makes you way faster on a bike. And not just a little bit faster, a full 15 watts faster at race pace. We may start shaving just to take a few seconds off our morning commute.
Waxing and shaving of the pubic hair is killing off the population of crab lice.
Because a large number of black males are unable to shave without severe irritation, Domino’s was found in violation of the 1991 Civil Rights Act by requiring all their employees to be cleanly-shaven.
The modern habit of women shaving their underarms started only during WWI because of a Harper’s Bazaar ad featuring a sleeveless outfit.
New Mexico law states, that females may not appear unshaven in public.