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why is it that sometimes fart smells nd sometimes not...?

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  • Anonymous
    1 decade ago
    Favorite Answer

    it depends on the foods you eat. like broccoli and cauliflower would give you terrible smelling farts.

  • 1 decade ago

    The technical name for a fart is 'flatus' and flatus is produced as a result of bacterial activity in the large intestine. These bacteria ferment undigested food, releasing nitrogen, carbon dioxide, hydrogen, methane and hydrogen sulphide.

    The last three are produced in quite small amounts but hydrogen sulphide gas is famous for its smell of bad eggs, even in small quantities. This is where the smell of farts comes from.

    Incidentally, the methane and hydrogen in flatus makes it quite flammable, and so the stories you may have heard of wild parties in which someone, who was probably very drunk, is persuaded to try to set fire to their farts is not as much of a tall-tale as you might have thought.

    The longer a fart is held in, the larger the proportion of inert nitrogen it contains because other gases tend to be absorbed into the bloodstream through the walls of the intestine.

    So a nervous person who swallows a lot of air and moves stuff through his digestive system rapidly may have a lot of oxygen in his farts, because his body doesn’t have time to absorb the oxygen.

    So I guess since oxygen and nitrogen don't smell bad...if the person is really "nervous farting" or if the gas has been in there a while, it won't smell. If the person is farting due to eating gas producing food (broccoli for example), then it will smell.

  • 1 decade ago

    guess it depends on what you ate...but I never have actually tried to smell them...LOL

    My cat's farts are always silent but very deadly! LOL

  • Anonymous
    1 decade ago

    depends entirely on what you have eaten!

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  • 1 decade ago

    what a weird question

  • Anonymous
    1 decade ago

    My dog's always do!

  • 1 decade ago

    because it has to do with what you ate, I think!!!

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