I am fortunate to have a name that can be male or female. If your name is strictly male or strictly female, just initiate an alt avatar by opening another account with a different e-mail address.
Make sure to select a name which is non gender specific so you can wear
products for male as well as female and switch up on occassion.
All avatars below are mine. (UnScene Tomorrow)
I just change the skins, shapes, hair and clothing.
I even have a Whitney Houston and Neo look!
Avatar movements made using LunaPic Online Photo Editor
http://www.lunapic.com/editor/
