so as far as I am concerned, those two are equal.
I don't really disagree with you... but would you get arsey with people who use "vagina" for the whole area when that's not correct? After all, everyone knows what it means.
For many people "time of the month" is no more or less a euphemism than "period".
It's not the words/expressions used that's the problem, it's the arrogance of claiming to be "better" (for want of a better term) than others because you use correct terminology. If people are using "time of the month", "on the blob", "on the rag", "shark attack" etc they're talking about it, which can't be a bad thing.
I do think that hiding it behind twee emojis is a step backwards though.