I moved into my new flat yesterday and very nice it is too. However there's one thing puzzling me:

Somebody who has been in the flat before placed a mirror on the toilet. It's too low for checking your reflection or anything like that. However it is at exactly the right height/angle so that when taking a piss (assuming you are male) you can see your penis and observe the act of pissing.

Why would someone set up a mirror in this manner? Has anyone else encountered this phenomenon before?