Does anyone know why electrical outlets in your home are all vertical except in the bathroom they are horizontal?

The reason I even noticed that is because I bought some really cool night lights for my bathroom but I can't use them horizontally because they are about 8" high with flowers and leave's. The base changes to all different colors and so do the colored mushrooms in the bouquet.
It's really beautiful to watch when vertical but not horizontal. 🤷🏼‍♀️
Does anyone know why electrical outlets in your home are all vertical except in the bathroom they are horizontal?
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