I think it's because this is something that is very hard to stick with. After the physical adjustment, one has to be willing to organize one's life in a way consistent with this, and that is tough when everybody uses this other mode of sleep.
I think it's because this is something that is very hard to stick with. After the physical adjustment, one has to be willing to organize one's life in a way consistent with this, and that is tough when everybody uses this other mode of sleep.