'Because' is not a valid reason.
You only sought 'because' to be there,
Since your purpose as to 'why'...
Could not be found to explain your actions.
And you expect me to question.
But I can't.
If you have no answers,
To eliminate my doubts.
Lawrence S. Pertillar
http://www.poemhunter.com/poem/but-i-can-t-3/