Bathroom Windows

One of life's biggest mysteries. Why are there windows in some peoples bathrooms in their home? The only logical explanation to this would be that if you made a stinky #2 it would let some fresh air circulate. However we now have air freshener and people still insist on installing a brand new window in their bathroom. Others may say it is for light but we now have lightbulbs and we have for a while. In my opinion the only reason for bathroom windows is if you would like for some random creeper to look in your window while you are doing your business. Bathroom time should be a great place to be alone but windows only hinder this. Please help me and the rest of the world figure out one of the biggest mysteries and stop putting windows in your bathrooms!