I thought of PMS as one of those things that happen. A bit like calling a normal, healthy pregnancy "swollen belly with moving infant inside it syndrome".
What I remember reading needed is that what researchers found was that PMS symptoms are highly reproducible month-to-month within the woman - something that reflects my own experience of needing to eat half a packet of chocolate digestives whilst crying about how far I am at T-minus four every month - and also highly variable between women. It also talked about symptoms being in some sense culture-bound such that different cultures have different common symptoms of PMS.
Lastly the bit I remember was this idea that because women are "permitted" by attributing their strong emotions to PMS to be more tearful, angry, whatever, they do this each month not wholly due to fluctuating hormones but also due to having a culturally acceptable explanation ("I'm sorry, I'm due my period.")
It was all very interesting. It was a medium my misogynist friend who raised the question with me, "do you believe in PMS" and I realisedIj had never really questioned it so I did a bit of reading.
If you drink black sambuca, and get a hangover, I will not feel responsible and will probably just hand you a large glass of water and some paracetamol and ask the chef to make you a greasy fry-up. Don't do it too often though and please do not vomit on the comfy sofas, on the bouncy castle, into the cannon or onto the goat.
Thank you.