@Setanta,
I am delighted that farts are an old and dependable source of humor...mostly because I have a gas problem that simply cannot be cured and I fart a lot. Nice to know that the embarrassment I feel when one cracks out at an inopportune time...may be adding to the humor quotient in lives around me.
A secondary reason for being delighted, though, has to do with another constant source of humor...which has more serious consequences than farts.
For some reason, people seem to think that one of the funniest things in the world is seeing some guy get clocked in the nuts. It seems as though everyone thinks that to be the height of humor. Watch an episode of
America's Funniest Home Videos ...a program I have come to loathe...and you will see a half dozen instances of guys getting their balls worked over by punches, thrown objects, or by accidents that have a guy painfully straddling a bicycle or hand-railing or something.
Farts stink; getting pounded in the nuts hurts. I vote or farts.