Bad news for the non-exhibitionists

Everything started from this (spamming) e-mail:

How to detect a 2-way mirror when we visit toilets, bathrooms, hotel rooms, changing rooms, etc.? How many of you know for sure that the seemingly ordinary mirror hanging on the wall is a real mirror, or actually a 2-way mirror? There have been many cases of people installing 2-way mirrors in female changing rooms. It is very difficult to positvely identify the surface by just looking at it. It's time to get paranoid. So, how do we determine with any amount of certainty? Well, once again, I am here to enlighten you. Just conduct this simple test:

Place the tip of your fingernail against the reflective surface and if there is a gap between your fingernail and the image of the nail, then it is a genuine mirror. However, if your fingernail directly touches the image of your nail, then beware, for it is a 2-way mirror! You can further ascertain the nature of the suspect surface by hurling an object (e.g. a chair!) at it. The chair will go through.

So remember, every time you see a mirror, do the "fingernail test". It doesn't cost you anything. It is simple to do, and it might save you from getting "visually raped"!

Share this with your girlfriends.

Snopes says the "fingernail test" might work, but not necessarily.