Why do Morris Men wear bells?
So they can annoy blind people too.
ah, it’s like the one why farts smell.
so the deaf can enjoy them too.
So that the Godiva wanna bees can run and hide when they hear them coming
MarkB
Why do Ceili bands start every tune with 4 clicks of the drumsticks?
To give everyone two seconds to vacate the premises.
Why is there air?
To pump up volley-balls!
–Bill Cosby
Why do people die of thirst in the desert and not starvation- Because of the sandwiches there. 
and why do Bakers have smelly fingers?- Cos sometimes they need a poo!