In 5th grade, someone taught me how to throw and I could do it for a few weeks. I remember being surprised that it had something to do with your feet and we practiced the feet separately with our arms down.

Then I didn't throw for a while and after that I couldn't remember what to do anymore. I think it is possible to learn it.

How about this:
http://www.wikihow.com/Throw-Like-a-...'re-a-Girl