I was once asked for my autograph in the shower on one of my rare visits to the gym. I was washing my hair, facing the wall, when I was tapped on the shoulder so already it's quite inappropriate. I turned round and there was another naked man standing there with a piece of paper. And I think 'if you can't see how inappropriate this I am just going to have to play along' so I took the paper, which is slowly becoming mulch, and carved my name in it.

David Tennant on fan obsession, The Graham Norton Show, 14 April 2011