[Slyfox]

In addition, women have menstrual periods "which in some cases last 10 days or more" and during which their husbands cannot have sexual relations with them. Therefore, it has been determined that a man might have a hard time being satisfied with one woman, and that it is better to rescue him from the sin of adultery by allowing polygamy.

When a bunch of women spend time together their menstral cycles all line up, which means they all have their periods AT THE SAME TIME.

[tessalu]

I have read the same thing. Islam reduces the worth of a woman to less than that of a good dog.

[Ronin]

That does not happen all the time.