they don't, it's just more comfortable and better for your body.
most sleep together in the same bed (or sleeping spot). Humans are Humans....what is a primal nature remains the same everywhere, not just the USA.
Why did the man sleep at the furniture store? He wanted a bed.
you need a bed, and click A
We need food and sleep
Generally when you are tired. If you are working then you need to go to bed according to the hours that you work, If you are at home all day then you would need to set yourself a regular routine and retire to your bed when you feel the need to sleep.
it means that you need sleep
A Bed A Bed
They basically do what humans do to survive. Like humans need to eat to survive and we also need to sleep to survive.
A sleep number bed costs about as much as a regular bed
they can sleep with there parents in there bed or if they had a sleeping bag they can sleep with them but in the bed in the floor
"Flowers" have a bed (they are planted in flower beds) and they do not sleep.
Monsters sleep when they are tired from hunting humans and need rest for the next day of hunting them.