Multiple generations also slept on the same bed, I'm surprised the theory is two sleeps and not multiple sleeps. Not that humans haven't habituated to group sle

Multiple generations also slept on the same bed, I'm surprised the theory is two sleeps and not multiple sleeps. Not that humans haven't habituated to group sleeps in tight quarters, but one bed feels qualitatively different than a bunch of tired submariners cramped in individual bunks or some similar arrangement.