no
No. Brightly colored sheets will not cause sleep problems. If you like brightly colored sheets by all means use them; it will make it more pleasant to go to sleep. But turn the lights off in your room when you go to sleep, or turn them down very low if you must have light in the room. That way you won't be able to see the brightly colored sheets while you are sleeping. Always try to find ways to make going to bed a pleasant experience, a relaxing escape from the world.
They can.
leaves and tiny sheets
I have done some reasearch for you and no traditonal european beds do not use sheets on there bed
yes they are during the hotter times of the year
On bunk beds, usually the bottom. His bed has blue sheets.
Sleep with their hotter friend.
because only people wear sheets and some horses but only the one who runs in races.
Wash your sheets and check unknown beds before you sleep in them
first 2 hours of sleep light sleep middle hours 3- 5 deep sleep 1-3 hours light sleep
because he pooed in his mouth
It means they are Full sized sheets. Often newly weds would sleep in a full size bed; hence "full/matrimonial".