Does putting your car key to your head increase its range?

We put this question to tech investor Peter Cowley:

Peter - As you say, if you go into YouTube, you'll find Clarkson for instance trying it a few years ago. So there's no doubt it does work. Now, why it works? There are two potential ways of looking at this. One is that it's a technical one which is, the cavity which is usually your head say, or your chest is acting as either a resonator in some form at the frequency that it's sending or it's acting as a ground plane. There's quite a lot of evidence that might be true. But if you look also a bit deeper, it may just simply be that you're raising it higher up, further from the ground. And so, there's no direct proof of either of those being correct.

Chris - That's your problem Kat. You're a little bit close to the ground.

Kat - I am. My head is so full of brain, that's why it doesn't work.

Peter - I should point out, the transmitted power from a little keyless remote is massively less than mobile phones. So, you're not actually endangering your brain cells in doing this.