She's Back!

From Sweet.

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Is it possible to leave a brown spot on your pants because of a fart? If so, what causes it?

Judging from what I see when I do the laundry, I would say that the answer to the first question is definitely yes.
As for the causes, we must remember that what we call "fart" and what we call "poop" are just end-members of a continuum. That is, we can have a pure fart, or a pure poop, or anything in-between, depending upon the admixture of the two.
If a sample consists mostly of poop with only a small fart component, you get such things as jet-propelled bowel movements and spongy, floating fecal masses (you know, the ones that refuse to be flushed down the toilet -- they keep popping back up).
If the sample consists mostly of fart with only a small poop component, you get what is known as "skid marks" or "fart art." These can also result from inadequate wiping, but the shape of the stain is different in the two cases. Inadequate wiping leads to elongate marks parallel to one's crack, usually with well-defined edges, whereas fart art is generally more circular and has an air-brushed look.
Fart art is most likely to occur if (1) a person is suffering from diarrhea, (2) the person is trying too hard to fart, and (3) the person mistakenly perceives the pressure against his sphincter to be gas pressure rather than liquid pressure. Again, that last situation is most likely to occur if the person is afflicted with diarrhea.

Enjoy…Sweet’s back!

xoxoxoxo