That's a bit of an offensive question... I personally found it disrespectful toward spirits (but hey! That's just me) but consider this: The entire world we live in is a life cycle. Add in the fact that "What goes into the system of a living organism, must also come out...". I feel further eloboration is not required as gases tend to be a product of our metabolic pathways. I also feel "farts" are unrelated to ghosts as this can be debated scientifically taking into consideration the digestive system, the function of the body and how the metabolic pathways effect it on a genetic level. This itself is a combination of Biology and Chemistry.

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