Why because? Because! That’s why.
If why is the question, because is the answer. The two go together like…well, like antagonist and protagonist. Or something.
Because precedes the reason for or the cause of.
Because also happens to be the key word in a story-building exercise I learned in improv called “Because of that…” I’ve played two versions of the game. Both have to do with cause and effect, but where one goes forward in time, the other works backward.