^^^ Regarding previous posts.
There's a Spanish saying that goes, "Para dormir lo que hace falta es cansancio." Which loosely translated to English reads, "To sleep, all you need is to be tired."
My father always used this saying, remembering how as a young teen, he would work on the sugar cane fields and after 10hrs. of cutting down sugar canes, all he needed was a hot plate of food and a floor. No need for a comfortable bed or anything like that to go to sleep. He told me many times that if I ever had trouble going to sleep, it was a sign I hadn't worked enough that day.