In wuxia novels, the sweat of female swordsmen was called "fragrant sweat" because it would emit a unique fragrance. This fragrance was usually caused by a substance called " actic acid " contained in sweat. It would form a special chemical reaction with the salt and moisture in the sweat to emit an intoxicating fragrance.
In wuxia novels, female swordsmen were usually known for their martial arts skills, and sweat was one of the important indicators to measure the depth of martial arts. Therefore, female swordsmen would often sweat a lot when they practiced martial arts and displayed their unique skills. The fragrant sweat was a manifestation of their cultivation results and a symbol of their identity and status.
It's hard to say exactly. Some believe it's through a divine act of creation, but that's a matter of faith and personal belief. Different religions and philosophies have their own explanations.
It could be that the Bohrs comic doesn't provide the necessary information or doesn't fit the topic at hand. Sometimes, certain references just don't add value or make sense to bring up.