A quote from Through the Looking Glass by Lewis Carroll
"I was wondering what the mouse-trap was for." said Alice. "it isn't very likely there would be any mice on the horse's back."
"Not very likely, perhaps," said the Knight; "but, if they do come, I don't choose to have them running all about."
"You see," he went on after a pause, "it's as well to be provided for everything."
It is like the old Boy Scout motto about being prepared, real men always carrying pocket knives, and having a loaded concealed firearm on you.
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