Farting is a manifestation of the normal operation of the intestine. On the contrary, if you don't fart, or fart too much and stink, that's an abnormal phenomenon. Fart is the waste gas discharged by the body, mostly carbon dioxide, hydrogen and methane.
The specific composition of fart varies from person to person and is also related to food.
Extended data:
Farting is mostly a sound, because the gas in the body is ejected from the tight anus, and in the process, it encounters the contraction and rebound of the human anus, which causes the sound to be interrupted, resulting in intermittent farting.
The long fart sound is too much gas, and at the same time the anus is not completely closed, thus forming a continuous fart sound, but a long fart sound.
It is often accompanied by arc sound, because in this process, when the gas leaks out of the human body, the anus is accompanied by the strength of the gas, which produces a closing effect, similar to the effect of inadvertently pressing the upper and lower lips when playing musical instruments or blowing with the lips.
References:
Bullshit-Baidu Encyclopedia