If you have a yahoo email, go to the first page of your email and press on the face of the avatar and it will take you to the page where you can change all of the avatar things including gender. Can you not decide your gender?
How to change the gender of your yahoo avatar?
Unless someone knows something I don't, the gender cannot be changed unless you change the gender in your profile first.
How to change the gender of your yahoo avatar?
Avator.com
