So that real estate agents would have someone to look down on.
or
At the Whale-weigh station.
or
Two. One to screw it in, and one to stab the other in the back and take all the credit.
or
That's proprietary information. The answer is available from AT&T on payment of license fee (binary only).
or
Humpty Trumpty wants Mexico to pay for it all.
or
I better not tell you, it might spread.
or