That PMS garbage is just that...garbage. If anything its an excuse, and something men go on about having no clue what they mean.
Cyclical changes have never affected me. I dont notice a lick of difference and neither had anyone else. Its BS.
And it’s been studied...men have “cycles” too. :-)
I believe things do change-like more tired or crampy or something-but not to the point that one becomes a shrew for a week.
I agree, PMS as it is commonly defined is BS.