As strange as it may seem, flatulence humour has long been considered funny in cultures that consider the public passing of gas impolite...
The Whoopee Cushion - for those of you who don't know - is a practical joke device that produces a noise resembling a raspberry...
When an unsuspecting victim sits upon the cushion, the air is forced out to produce the sound of human flatulence!
Inflate halfway for best results.