Ah, menstrual cycles.
For how much longer will they be a source of controversy and mystery?
If it's not some random bloke "calculating" how many tampons a woman needs per cycle (this just in: no one asked you), it's another man suggesting it's 'nonsense' that people can't afford sanitary towels.
However, the latest instalment in men learning about periods is actually not that offensive at all, just a little naive.
Twitter user Farah was having a conversation with a male friend and wrote:

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"I woke up in period blood which is always fun!"
"How does that even happen?" he replied.
"Umm... I got my period overnight??" Farah said.
His indignant response was: "You're really expecting me to know how periods work... that's kinda crazy."
Eventually Farah got to heart of the confusion:

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"I meant I didn't know it was possible to get it overnight," the man added, "That's it."
Farah had the perfect riposte: "How would it only happen during the day? You think our uterus waits for us to wake up?"
But her friend wasn't done yet, as he then asked: "Cause the body shuts down during sleep?"
Since sharing the...endearing exchange, Farah has got a lot of attention - and not all of it good.

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Speaking to Metro, she explained: "Most people laughed with me while some insulted me saying I'm a b***h and should've educated him."
"But really if you're 24 and have got no semblance of an idea how women's menstrual cycles work that's your conscious decision to be ignorant!"
Here here!