I've used myself as PP dummy loads of times. Used to do it at lunch times at my desk. A copy of Erle Montaigues Dim Mak book in hand, and just prodding myself, what was weird in the office at first just got accepted as just "Gav".
The pain factor caused by pressing makes this point makes it an ideal point to used when trying to move people who don't want to be moved!
Don't worry, I'll be your volunteer on Sunday when you pop down mate....You still owe me some pain from when I introduced you to that GB cluster last time you were down!