This is a rip-off thread from physicsforums.com. But I think it’s really cool. So, here we go:
If you knew of a place where you could get a really really cheap laugh, how often would you go there?
how often wouldn’t you go there?
As often as I could.
What is the main advantage of a cow before a jet-propelled helicopter in terms of colour theory?
On a treadmill?
The cow will take off.
You’re supposed to ask a stupid question after you answer.
how old is time?
I did, but you didn’t…
but I answered my own stupid question…
and your answer isn’t very stupid.
How is this game played again??
You’ll find a list of rules here…
http://www.simplych.com/cb_rules.htm
old enough to be in an OAP home, thats for sure
If a tree falls and nobodys around, what sound does it make?
i dont know if i ever hear it ill tell you
if 1 syncronised swimmer drowns do the others have to drown too 
If there dedicated enough
do you watch porn?
why do you want to know
if barbie is so popular why do you have to buy her boy friends 
to avoid pollution laws
whats the meaning of life?
42
Why do men have nipples??
because the male embryo follows the pattern of a female during the first few weeks of pregnancy, Jade’s boyfriends answ: Whats an embryo? 
Why do people unicycle?
I don’t know about the others…
but unicycling fills that spot in my soul where Jesus is supposed to be!
How many licks does it take to get to the center of a Tootsie-Pop??
Devastatingly.
How come the don’t sell globes of Europe?
'cause i said so
what if the best unicycle you can’t afford
Then it sucks.
Do you really undestand the meaning of really?
This is a really difficult question.
How many eggs will fit into a fridge, while 2 ants carry a tank across the street?