Because the floor would be too uncomfortable.
People sleep on beds because they provide comfort and support for the body during sleep. Beds offer a flat and cushioned surface that helps to relieve pressure on different body parts such as the back, hips, and shoulders. Sleeping on a bed also helps to maintain proper spinal alignment, which promotes a more restful and rejuvenating sleep experience.
beds
Pakistani people sleep on matresses but don't have beds
Mainly beds.
Yes, many Americans have mattresses to sleep on.
Traditionally they would sleep on futons Now many people sleep in western style beds.
Beds were made because when people wanted to sleep they wanted to sleep on something comfortable so their back wont hurt.
they sleep on cots or regular beds
Tempur beds are stiff and spring mattresses are bouncy and fun to sit on and sleep on. Also, many people believe that you can't sleep well on Tempur beds.
Some people sleep on hammocks but some of them sleep on beds but when i went to Mexico i slept on the hammock.
the floor is too hard
i dont know..... beds maybe??
Of course not. People in China have beds too!