That is a very interesting theory.

...
I think you may very well be right, he also seems to cackle every time he does it... maybe he has a electric fetish of some kind!
I am pretty sure we could make an anti-force lightning campaign commercial out of his better pictures. I will start it up

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Palpatine seems to be quite normal in this photo
He is starting to thirst here... the power of the cookie force is just too strong.
Oh yeah, that is the stuff!
See how smug and addicted he looks?
Must... make... more... lightning!