hehe, it is quite disgusting huh???
but do you know what is it???
place to produce fart is large intestine, residue of food that is not absorbed in small intestine will in to the large intestine to be processed by micro organism that produce gas.
the produced gas is formed by Hydrogen, carbon dioxide, Methane, sulfide and so on, it about 400 component.
The largest number of fart gas is methane, and the stinky is come from sulfide, if there is an accumulation of those gas, it will come out through anus and make muscle of anus will tremble and make a sound that we called fart, hehehe
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