Because that's the way we always done it.
Back-in-the-day we had two keys for a car, one for the ignition and one for the trunk. The one for the ignition had a square-ish head; the one for the trunk had a round-ish head. Get it .. ??
Maybe this story will help explain.
"The wife sent this old boy to the store for a ham. After he bought it, she asked him why he didn’t have the butcher cut off the end of the ham. “This old boy” asked his wife why she wanted the end cut off. She replied that her mother had always done it that way and that was reason enough for her. Since the wife’s mother was visiting, they asked her why she always cut off the end of the ham. Mother replied that this was the way her mother did it; Mother, daughter and “this old boy” then decided to call grandmother and solve this three-generation mystery. Grandmother promptly replied that she cut the end of the ham because her roaster was too small to cook it in one piece."
Now do you get it .....??
(it must be time for my medications)
@
Tcoat or @
Ultramaroon will splain it.
humfrz