For years, I have put a large mark on the edge of my bottom sheets, so I can tell which way to put them on the bed. There are few things less important in the overall scheme of life, but more frustrating, than to have to spin a sheet around to get it on the bed properly, especially if the cat is “helping”.
The fitted sheet I bought last week has little tags sewn into the hems, which say “Top or Bottom”. I’ll bet a woman thought of that.
thisendoftheswamp 
That a woman came up with idea is almost a bet worth making.