I've got a little bit of a strange one I am yet to determine the cause of.

My MacBook Pro, and MacBook Air (and also phone) all shock me and have what can only be described as a "grippy / buzzy feel" when placed on charge at my partners place - anywhere else is totally fine. Power supplies are earthed, and if I use the non-earthed attachment things get much worse (I can't use my laptop when it is on charge).

Any ideas with what causes this? It has always been somewhat a mystery to me.