User blog comment:Admiral Leviathan/How to Tell if Your Character is a Mary Sue/Gary Stu/@comment-24463386-20110228025704/@comment-1535286-20110228043138

@Jake

Gender means more than how you act. A girl, like my sister or 58, that acts very tomboyish could be considered more masculine than feminine. @SSM

In those cases a) the person who wrote it was being ignorant, or b) they actually meant what they said, and your choice should be based off of your gender instead of your sex