Why Not Why?
I hate it when people say "how come". Is there some problem with the word "why"? How come. Think about how stupid that really is. How come? Well, if you are across the room I might come by walking. If you are across town I might come by driving.
What is that all about? It isn't short for why. Why is three letters. Very easy to say. Why. Use it.
You know what I hate even worse? House come. House come ya done that Pile? I hate house come's guts and livers.