Why do I get this numbing tingle every time I touch an electronic?

Every time I touch an electronic device (My PC, iPad, iPod, phone, iPhone, iMac, laptops, my tv, etc) I get this weird tingling feeling when I move my hand on it. Almost like a vibration combined with a bit of a numbness. That feeling is moderate, and fades into the rest of my hand. Though where I'm touching with it, it is very noticeable. It also only happens when my feet are on the ground.

Well that was over a year ago, now a month ago I put my hand on someone's shoulder and felt the same feeling on my hand again. Something not electronic felt electric. That and it happened again when someone was touching a computer and I touched them.

Now today I was making a peanut butter sandwich and went to go get a butter knife, when I got it the metal butter knife constantly felt like it was vibrating. Something that's just metal, not living or electronic.

I received surgery on my arm 2 years ago when I was hit by a car, I got a metal plate and 8 pins which still remain in my arm. Despite my humerus being shattered, it was fully healed in a month to a month and a half. That and I recovered from my severe blood loss and concussion fully of course as well. My doctor said plates and pins shouldn't be the case though. Someone else suggested it could be that I conduct electricity very well though I feel this is too intense to just be conducting.

So why am I feeling this? What causes it? Is it good or bad? What is it all together?
Any ideas or answers are great!

I agree with the person who said you're conducting electricity. My brother's been like this all his life. He can't put his hands near those little electric ball lightning things because they explode. He can't wear a watch unless it's completely mechanical. He's really hard on computers and other electronics. Try and wear rubber soled shoes and stay out of lightning storms.