How come my car remote works if I press it while holding it against my head?

So I’m standing forty feet away from my car, and I click the lock button. Nothing. I lift the remote up really high and try again. Nothing. Hrmm. I press it to my chest and try. Nothing. Then I put the remote next to my head and try and it works the first time.

Is there metal in my head? Is my head a better antenna than the rest of my body? What is happening here?

I don’t have any metal dental work.