Most of the time we don't notice how weird our language tends to be.

Lets say a store just got robbed, the store owner is chasing the burglar and yelling "Call the cops!"

Why do we call them cops? Well, you see, back in the 1700's american police wore badges made of copper. Hence the nickname coppers came around. Later, the name was shortened into "Cop"

Or how about idioms? What does it mean to shoot fish in a barrel? Why would one go through the trouble of putting the fish into the barrel and then shoot it? Why not just keep the fish outside the barrel and cook it? Why take the extra 2 steps? The irony is, the idiom means to do something with ease. Litterally, your taking two additional, unnecessary steps to complete a task you could have done as soon as you had the fish, making things more complicated, not easy. Not to mention that the bullet probably wouldn't reach the fish due to the water...

Its just one big mess.