Speaking of sex and reproduction, something that I have been reading recently, though I still find it hard to believe, is that intimacy wasn't really a thing up until the Victorian era or so, because beds were very expensive, as well as real-estate, so an entire family would share one. Meaning, a family would get a huge bed, and in it would sleep the parents, children, grandparents and maybe uncles and cousins as well. So you would have 10 people in bed, and if you wanted to make your 5th child, you would just do it with your wife right there, everyone would be aware, but barely anyone would care, since it was as natural as eating or shitting. Now don't get me wrong, I am not claiming it would become some hentai-level orgy, only that the parents would have sex, with all those people surrounding them, doing nothing but watching. At best the others would sleep on the floor while doing it, to give you some space. Also sleeping in the same bed, wasn't necessarily a sexual act, again because beds were so expensive, it wasn't uncommon for men to share the same bed, and there were strategies on how to get a good "bedmate", like someone who wouldn't snore, or someone who could match your intellectual prowess and so on. Almost like it was weird to sleep alone in a bed. Even John Adams and Benjamin Franklin, shared a bed at some point, and kept on arguing on whether to leave the window open or close it for the night.
https://archive.ph/wip/MziAc
Now again, I am not claiming it was gay, please put down your yaoi glasses. I am only saying, that finding a good bedmate was important, and as a man back then, why wouldn't he share the bed with his best friend.
Now as someone who is very reclusive, and can even understand the desire to sleep in separate rooms from your loving, loyal, beautiful wife, I find the idea of sleeping with the entire extended family and maybe even friends in one bed, off-putting.