Got my first mobile phone at the beginning of the year. I've never cared much for talking on the phone, and still don't, so I don't spend much time on it at all. Probably use it more to check the weather report than anything else.
Anyway, I don't know if it's just a bit of psychosomatic paranoia, but I swear that when I carry the phone in my pocket, I often feel a tingling sensation in my leg, and sometimes even numbness. Don't know if this is a common occurrence, but it definitely makes me wonder what it's doing to my already-too-squishy gray matter when I've got it up to my head.