I wish you had actually included evidence to prove this and the others like the heart monitor and sunglasses. All I can do is take your word for it. It is more helpful to have evidence when making these assertions. I don't know about the science behind the automatic faucets and dispensers, but I am white and it never works for me first go. It actually takes me several tries before it works. And usually the first time it works, i have just taken my hand away so I've got to put my hand back again. This is why evidence helps because based on my experience, it isn't true