culturally shaped expression of sexual difference: the masculine way in which men should behave and the feminine way in which women should behave

(Emphasis mine) This is where I struggle with the difference between sex and gender. I was raised to believe that there is no "should" here. Some biological male people were effeminate; some biological female people, masculine;* and most are a mix, and there's nothing wrong with that. I've always believed that it was a cultural observation, not a cultural obligation that the majority of males were masculine and females feminine.

• I struggle with proper semicolon usage, too.