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No, Mr Mags doesn't use OFF. If there was a thread that I thought he would be interested in, I have sometimes shown it to him on his iPad. Other than that, he's not bothered with it.
Aah, but does anyone really know for sure? If they were, would they use a name that you would never suspect? Could you actually be communicating with your other half without realising? Now there's a worrying thought.