What did Ra mean by...?

[Nau7ik]

What do you think that Ra meant by: "...that each biological male is female; each biological female is male" in 5.2?

Maybe this:

https://en.m.wikipedia.org/wiki/Anima_and_animus

I think this is a very important concept! The anima and animus; The collective unconscious feminine and masculine nature of men and women.
This, together with the physical characteristics, is ample proof that men and women are not exactly the same; that the polarity of sex matters a great deal; that the polarity, which is biological sex, is NOT a social construct. Cultural ideas about men and women may varie, but if you look deep at it, these qualities are of a masculine or feminine nature. At the base level (for a female), the masculine image exudes strength and power. Our ideas of what a man is is refined and developed from this immature conception. It’s not wrong, but it’s not a full understanding either. At the base level for the male, the feminine image is the object of his desire. As we can see, both of these levels of animus and anima are animalistic, unrefined, concerned with reproduction.

These images / ideas are refined and developed in the course of our evolution and personal spiritual development. The mind is broadened. Jung describes the different levels of development of the anima (for the male) and the animus (for the female).