Our flatulence is mostly made up of nitrogen, oxygen, carbon dioxide, hydrogen and methane. (This last gas is the flammable agent in a lit fart, btw, but only a third of us produce enough of it to set a toot on fire). Although the aforementioned gases comprise 99 percent of farts, none of them explain the telltale smell. Bacteria in our guts produce the CO2, hydrogen and methane in our farts, and they must also be responsible for other trace gases that stink.
For Provine, the noisiness of farts begs the question: Why don’t we talk out of our butts? No parts of our vocal apparatus evolved specifically for making sound, he points out. “We speak through the same toothy orifice through which we breathe, eat, drink and vomit, and the vocal folds (cords) used for sound production are simply two flaps of muscular tissue that act as a seal to keep food and drink out of the airway when swallowing,” he writes in Curious Behavior. “We ‘play’ this biological instrument to produce speech.” The GI tract has enough analogous morphology to produce sound in the form of farts, but a missing mouthpiece -- or buttpiece, so to speak -- keeps us from effectively shaping sound-producing vibrations into words.
I always enjoy a good article on farting and, while this article is informative and interesting, it's rather poorly written. The author uses "comprise" when s/he should have used "compose." The parts compose the whole and the whole comprises the parts. It's basic English vocabulary and has been for several centuries. The author is no doubt the victim of sloppy schooling. Sad.
Also, the author doesn't know what the expression "beg the question" means. It certainly doesn't mean, as the author implies, that something prompts a question. It means that the author or speaker has taken something for granted, usually something important. For example, if a reporter asks the politico-du-jour, "Senator, do you still beat your wife?", that reporter has taken for granted that the Senator beats his wife. He has "begged the question" as to whether or not it's true that the Senator beats his wife. Doubly sad.
I noticed the comment about tears only mentioned sadness. I am moved to tears sometimes by certain music and be very happy. What causes this if supposedly they are only triggered by sadness?
If the book is as hollow of content and as full of conjecture as this article, it is a waste of paper.