Nope..Cork sandals will produce the same effect. It's not highly individual, it is highly reported many times by many people, but usually cast off as irrelevant or unimportant to people's daily life...

Dude, you really need to make sure your gear is grounded properly. You should not be getting electrical shocks from touching stuff. I can't begin to tell you how many times we've had screwball problems with equipment that had floating voltages due to poor earthing---problems that went away the minute we fixed the wiring. (The guys maintaining said equipment though nothing wrong of the fact that they were getting shocked and said nothing about it for months!)

I get shocks "all the time". It's when humidity is low and I build up a static charge, which happens in the winter because outside air hasn't got much water in it, then it gets heated to room temperature and has very low humidity. There's no mystery here. I bought my first wireless router simply because I was frying my wired routers; I'd systematically walk through all the ports, destroying them one by one, then I'd have to buy a new one. I realized it was cheaper to pay much more and go wireless than keep buying wired routers. I cringe when it happens now because I always know I'm frying something, I just don't know what. Fortunately, I've got a house humidifier now, which mitigates the problem.

Alternatively, as others say, you've got a grounding problem. But that's a different sort of shock.