Male/Female

[unity100]

This speaks to the fact that gender is switched and selected according to requirements, but does not say it is due to polarity.

it says that, a polarity exists. an entity may choose to incarnate as a man, despite being polarized as a female. (and this is a reason why there are homosexual situations - ra says if an entity has spent 60% or more of its past lives in a certain gender, it may experience homosexuality if incarnated in a certain gender).

it is not mandatory to choose to incarnate according to polarity. if a particular incarnational programming requires a certain gender, probably the entity chooses it. we are told that even negatives may choose hard life conditions to harden their polarity, even though such situations are much undesirable for a negative entity.