(Just for fun) Wonderments

Why is it that when you give someone "a penny for their thoughts," they give you their "two cents worth?"

What does it mean when you see an "end speed limit" sign? Can you go as fast as you want?

Why does "speed zone ahead" mean you're going to have to slow down?

Why are they called "apart"ments when there's always lots of them together?

Who puts the thin ice signs onto the thin ice?

What does a sign that says "Fine for Speeding" mean?

Why do women pluck their eyebrows, then draw them back in?