In between the thumb and forefinger
might be convenient for waving at RFID detectors but there isn't much in there that isn't useful, much better to put it somewhere a bit of tissue damage won't be too incovenient - like your buttocks. Unless of course, you're a compo lawyer, in which case it's a great idea.
Plus I now know what bit of the CEOs anatomy to chop off when I want to break into the building i.e. both hands just in case they are left handed.