"A friend of mine was getting b#tched at by these 2 identical twin girls in a class I had once, he replied with a troubling look on his face and said "if you two are identical, how come only 1 of you are hot?" That dude played the long game as those two girls looked rather perplexed for the rest of the session."
Luckily you never will be the boss of anything.
He DID have something to do with it.
He chose to be an idiot with a 50 year old outdated joke.
And he actually believes a normal biological function that can definitely influence your mood greatly is something she can control and is an insult... somehow.
It would be the equivalent if you had a stinging pain in your foot for a few days a month and had to be walking around all the time.
I wonder how your mood would be then...
But you would know this if you had ever been in a relationship with a woman.
...Or a woman could have ever tolerated your childish mind to talk to you for more than 5 minutes.
Obviously you were triggered by my comment VERY much if you had to react.