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Maybe it's the exposure, the vulnerability or simply a white-hot resentment of men. Whatever it is, few things from Hollywood's greatest creative minds elicit the crowd-pleasing merriment of watching a grown man take a monster shot to the groin.
Around since antiquity, the assault on a man's nether region is enjoying a sort of renaissance — if such a highbrow word can be used in such a lowbrow context — becoming a virtual staple of the summer comedy as evidenced in such current films as "DodgeBall," "Napoleon Dynamite," "White Chicks" and "Anchorman."
And it's not just slap-happy times at the movies. TV sitcoms and advertisers frequently capitalize on the visual gag's comic potency too. Audiences today can't seem to get enough — and perhaps they never have and never will.
"It's been around at least since ancient Rome," said Amy Richlin, a classics professor at USC who teaches a course on comedy. "There's something about the things that stick out of the body — noses, ears, a woman's
— that seem to be funny. It's like bodily fluids, they make people laugh."
http://www.latimes.com/news/custom/showcase/la-et-miller19jul19.story