Allan Kardec. The book of spirits (№ 395774)

Question: preference for spirits to incarnate in the body of a man or women?
Answer: It is of little interest to the spirit, it depends on the tests that he needs to survive.
The same spirit can freely choose and change the floors in their physical beings, because he himself, as spirit has no sex, as perfume should be improved in all respects, each gender, as well as each social position provides them with special trials and duties, and hence the chance to acquire experience; one who has always been a man, would know just what men experience.