Have you considered the annoying habits you have, that are perfectly normal to you, but during the run of BB you realise that this would more than likely be broadcast to x million people.

I suppose the most obvious one would be the extreme nose picking that anyone with my nose performs regularly, or for men that annoying habit of adjusting your trousers whenever you get from from a chair. It could even be the fact that all your underwear predates WW 1. Have you ever actually considered that what to you think is perfectly normal behaviour, disgusts whoever you live with, but because they love you/tolerate your disgusting habits, they have never told to stop, but because you realise the total exposure of Big Brother you might consider the fact that your crotch scratching might annoy a lot of people, that perhaps you ought to be a little more thoughtful to those around?

I have thought about it whenever BB chooses to highlight these things with contestants, and it is probably one of the few times I have sympathy with anyone who acts uncivilised in public.