The idioms "stinky shit" and "shit" mean that shit and shit stink. Why is this?

Feces is a mixture, generally speaking, it is organic carbides, ammonia, and sulfides.

Most farts are created by E. coli and other bacteria in your intestines. These bacteria eat the fermented food in your body and then fart microscopically together; the air you swallow and the alkaline secretions in your abdomen also play a role in your farts. On average, a fart is made up of approximately 59% nitrogen, 21% hydrogen, 9% carbon dioxide, 7% methane, and 4% oxygen—all odorless gases. But less than 1% of it is composed of trace amounts of other chemicals - such as ammonia and skatole, which emit unbearable pungent odors and are present in only one part of 100 million parts of the air. , people can smell it; if the Pentagon can concentrate these chemicals into a gaseous compound, then we may not even need nuclear weapons to cause mass destruction. Usually, farts are always mixed with hydrogen sulfide, which mostly comes from mucus, giving the fart a rotten egg smell. (In fact, a doctor named Michael Levitt at the Veterans Administration Hospital in Minneapolis said that sulfur is actually the worst ingredient in farts.)

Because of the hydrogen A mixture of methane, oxygen and methane, farts are no different from ordinary biogas - they are also explosive and flammable, enough to cause a minor explosion. If a fart is trying to escape, and you hold a match to the anus, the flame will immediately turn blue and flash suddenly, causing your friends to jump for joy. If the flame is strong enough, it will singe the wool on your butt.

When the fart comes out of your anus, the temperature is 98.6 degrees Fahrenheit, which is the same as yourself or your feces. But that's just the temperature before you realize it, and then it gets hotter or cooler depending on the context in which you fart, whether it's a snowstorm or a Jacuzzi bathtub . Once the fart is released and blends into this colorful world, it will immediately run away from the "explosion point". Someone has measured its speed, which is as high as 3 meters per second. This is much faster than the fog that can only crawl slowly with kitten steps.