why do we always laugh when we hear someone fart or when we smell a stinking fart?

[NeedHope]

for example in class if we smell a stinking fart we all become disgusted and laughing like hell in the same time ,why farts have to be so funny it's Natural thing ,right ?

[Zodiark]

lol its just funny i guess, as you'd expect people to do that sort of thing in private.

[Premaholic]

you must mean, "Why do I".......