So that real estate agents would have someone to look down on.
or
The ceremony was rubbish - but the reception was brilliant.
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Bike helmets don't fit hippos
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2 years old.
Cow: "Mooooove over"
Sheep: "Naaaaaaa."
or
Nearly unanswerable, since the one who tries to change it usually drops it, and the others call for a planning session.
or
Two… one to tell the engineer to do it, the other to say "I don't know, what do you think?"
or