I agree entirely with all that Seamus and Bill have said. They are both right.

Reminds me of the teacher who walks into class one morning and sees a dick drawn on the blackboard. She quickly grabs the duster and erases it. She says nothing about it and commences the lesson. The next morning she comes in and sees another dick, twice as big drawn on the board. Again she rubs it out, says nothing and gets on with the lesson. The third morning when she comes in there is a huge dick the enire length of the board, with the caption:
"The more you rub it the bigger it grows."

The same could be said for Shambles and his obsessive behaviour.