It's all a bit Brian though isn't it. He didn't tell his parents, he 'came out' on the show.
I'm not sure what to believe, he has played the poor man's Brian since the auditions (the pathetic 'how do I take this microphone off' in the mock diary room). Brian had the novelty factor, as well as being totally stupid in the nicest possible way.
Marco is a law student playing stupid and playing the public as fools imo.