Why do so many people think Tom Cruise is gay?

So Tom Cruise manages to get another claim that he is gay squashed through the courts [BBC News]. This time a judge has ruled that the star isn’t gay. Quite how he checked isn’t mentioned. The interesting thing about this story is that if Cruise did turn out to be gay after all of this he’d almost certainly have perjured himself time and time again. The question is though – why do so many people think he is a poof?