Well, I have visited multiple cities and stayed in various hotels. I have seen that Hotels tuck sheets under the mattress, I know this is not a proper place to ask this kind of foolish answer but still I am curious and want to know about it. Is it a co-incidence or there is any specific reason?
First of all, after tucking the sheets under the mattresses, looks better. In spite of this, there may be other reasons like neat and tidy appearance and all. If you are sleeping on a bed which sheet is not tucked, there is the possibility that when you awake in the morning you could see that your sheet is not on your bed properly. It may look like fully wrinkled.