i have always had an extreme aversion to flatulence.
when i was very little, i read that the sense of smell is the result of microscopic particles of whatever is being smelled coming into contact with my olfactory epithelium.
this taught me that the contents of the flatulators' anus is touching the inside of my nose.
i am absolutely insensed at the invasion of my nostrils by a persons colonic expulsion.
when i was young, people farted deliberately in my presence in order to see my extreme evasive reaction. they found it funny. even in a class room, they farted at me because i would immediately run out of the class. i also used to (and still do) wipe my lips dry so that fewer particles get stuck on my lips. to think that the particles are even touching my skin (although i can not sense that) adds to my revulsion.
the goofy inane laughter of those who farted, together with the mirth of their friends who made no attempt to get away themselves made me very hostile to the whole genre of supposed "fart humor".