Facts on Farts You Die to Smell!!!! Part 1

What makes farts stink?
The odor of farts comes from small amounts of hydrogen sulfide gas and
mercaptans in the mixture. These compounds contain sulfur. Nitrogen-rich
compounds such as skatole and indole also add to the stench of farts. The more
sulfur-rich your diet, the more sulfides and mercaptans will be produced by the
bacteria in your guts, and the more your farts will stink. Foods such as
cauliflower, eggs and meat are notorious for producing smelly farts, whereas
beans produce large amounts of not particularly stinky farts.

Why do farts make noise?
The sounds are produced by vibrations of the anal opening. Sounds depend on
the velocity of expulsion of the gas and the tightness of the sphincter muscles
of the anus. Contrary to a popular misconception, fart noise is not generated by
the flapping of the butt cheeks. You can see proof of this in the close-up video
footage of Carl Plant's fart on Mate-in-a-State .

Why are stinky farts generally warmer and quieter than regular farts?
(Question submitted by many, many people!)
Most fart gas comes from swallowed air and consists largely of nitrogen and
carbon dioxide, the oxygen having been absorbed by the time it reaches the anal
opening. These gases are odorless, although they often pick up other (and more
odiferous) components on the way through the bowel. They emerge from the anus in
fairly large bubbles at body temperature. A person can often achieve a good
sound with these voluminous farts, but they are commonly (but not always!)
mundane with respect to odor, and don't feel particularly warm.
Another major source of fart gas is bacterial action. Bacterial fermentation
and digestion processes produce heat as a byproduct as well as various pungent
gases. The resulting bubbles of gas tend to be small, hot, and concentrated with
stinky bacterial metabolic products. These emerge as the notorious, warm, SBD
(Silent-But-Deadly), often in amounts too small to produce a good sound, but
excelling in stench.

How much gas does a normal person pass per day?
On average, a person produces about half a liter of fart gas per day,
distributed over an average of about fourteen daily farts.
Whereas it may be difficult for you to determine your daily flatus volume,
you can certainly keep track of your daily numerical fart count. You might try
this as a science fair project: Keep a journal of everything you eat and a count
of your farts. You might make a note of the potency of their odor as well. See
if you can discover a relationship between what you eat, how much you fart, and
how much they smell.

How long does it take fart gas to travel to someone else's nose?
(Question submitted by SteF)
Fart travel time depends on atmospheric conditions such as humidity,
temperature and wind speed and direction, the molecular weight of the fart
particles, and the distance between the fart transmitter and the fart receiver.
Farts also disperse (spread out) as they leave the source, and their potency
diminishes with dilution. Generally, if the fart is not detected within a few
seconds, it will be too dilute for perception and will be lost into the
atmosphere forever.
Exceptional conditions exist when the fart is released into a small enclosed
area such as an elevator, a small room, or a car. These conditions limit the
amount of dilution possible, and the fart may remain in a smellable
concentration for a long period of time, until it condenses on the walls.