maybe he has a crush on you and trying to make contact?
I also find that playing piano in stocking feet keeps the pedaling quiet too.
Thanks for the pic, Gerry
instead of depressing the pedal as you or I might, he would then apply pressure from the inside edge of the shoe down along the right-most edge of the damper pedal. So he actually operated the pedal from the side of it instead of front-on from the top!