[tedunangst]

The intent is often to construct a purposefully broken sentence, mirroring the broken logic that comes next. The word after because would only satisfy the question "why?" if you're a moron.

I put bacon in my salad. [why?] Because bacon.

That explains absolutely nothing, the implication being that if you're asking why, you're a moron and nothing more can be explained to you because bacon is so overwhelmingly and obviously self-justifying. Other interpretations abound as well.