oh gosh... that's too funny - poor traumatized guys
you are special
Two words, "GOOD GRIEF"
Oh you tease... :)
I'm sure they wouldn't want to see all naked women anyways, fat people with saggy **** walking around..
Or take a trip to your local Walmart
You know I think about that often? What did female humans do in primitive times? Just bleed all over the place?
That's me turned off!
Actually many men do prefer women to wear at least something, as we find a little mystery far more alluring than nakedness.
I remember reading something like this, in a text-book on human sexuality & breeding & that sort of thing:
Menstruation has " fascinated and repelled men throughout history."
I expect there's a biological reason why you females have headaches that make us mere males run a mile once a month - but as I don't really understand the physiology I don't know what that reason may be. (As single, 60 & love-life long over, I don't need to understand the err, subleties, of human breeding!)
Mind you, TheLeela's question is a good one. I suspect primitive women did what I think women in tribal societies still do, and that is hide away or use some sort of cover or towel. We can't know of course, but total nudity by both sexes all the time appears to have been always rare. Although there is no possible way we can know their beliefs and ideas, they were not stupid and there is no reason to suppose they could not be as discreet or otherwise as we are today.
I wonder what our forefather (mother?) species did. The Neanderthals were contemporaneous and may have interbred with H. Sapiens so must have had similar "works". What though of those earlier still, like the Australopithicenes or Heidelbergensis? Do female bonobos & chimps - primate-genus branches, not hominid ancestors - have similar events? Maybe the early hominids still had physiology & fertility cycles lasting months or annual, like many other mammals.