>"Laughing" 

>A man walks into a pharmacy and asks for a pack 
of condoms. As soon as
>he has paid for them, the man starts laughing 
and walks out. The next
>day, the same performance, with the man walking 
out laughing. The
>pharmacist thinks this odd and asks his 
assistant, if the man returns,
>to follow him.
>
>Sure enough, he comes into the store the next 
day, repeating his
>actions once more. The assistant duly follows. 
Half an hour later, he
>returns.
>
>"So did you follow him?"
>
>"I did."
>
>"And...where did he go?"
>
>"Over to your house..."