In my grade school days, I recall a teacher proclaiming to the class:
You should never start a sentence with the word "Because".
Of course, I've since seen lots of examples to the contrary, and done so my self that seem to be perfectly correct, grammatically.
Did she shorten some other rule that allows for specific exceptions?
Did she just make it up because writing sentences starting with
because is a little tricky for young and inexperienced minds?
Is there some other reason?