Hey me and my friend just found out that you can use the [Pygmy Oil] and that way get the gnome female buff, then combind it with a [Savory Deviate Delight] and turn you into a human Female pirate or ninja for 1hour! I only tested this with my tauren male, but im sure that if you test it on a female it will turn you into a male Ninja/pirate for 1 hour too.
So to sum it up:
1. Use [Pygmy Oil] and get the Gnome buff to change your sex.
2. Use [Savory Deviate Delight] turn into a ninja/pirate of the oposite sex for 1 hour
3. ENJOY!