A man goes into a Builders Merchants and asks to order 7,000 bricks.
"What sort of bricks would you like?"
"Dunno. What sorts are there"?
"Well. There are facing bricks, engineering bricks. What are they for. Are you building an extension, or a garage or something"?
"No. I am building a barbeque"
"A barbeque! You don't need 7,000 bricks to build a barbeque".
"You do when you have a flat on the 7th floor".......