Consider that masculine and feminine aren't set points. They're constantly changing and aren't consistent from one culture to another. They're not even totally consistent from one person to the next. For instance blue was/is the feminine color, and pink the masculine one. Gender is a spectrum partially by virtue of its lack of fixed positions.

There's more or less a masculine and feminine dichotomy, but that's by no means permanent, nor has every society on Earth had those two.