A woman can talk with less effort than a man because her vocal cords are shorter than those of the male. Not only does this cause her voice to be higher pitched, it also requires less air to agitate the cords, making it possible for her to talk more, yet expend less energy.
I obtained this informative tidbit from a book in my possession, entitled A Fun-Filled Collection of 1800 Tantalizing Facts, by E.C. McKenzie.
Explains quite a lot, doesn't it? Now, where's my bullet-proof vest?
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