I'm not sure of the logic but many of us at home, including myself cannot sleep well without our own pillows. Away at a hotel or resort, or at a relatives home, sleep does not come easy except after a heavy dinner in new surroundings.
Caution: Explosive. Handle with care.
"Do not give up, things might not favour you always"
There are few studies which have proven that sleeping without a pillow and on the floor has incredible benefits.
But if one is sick, in debts or having some serious tension, then even the softest and sweet aroma giving bed will not give him sleep.