Because I just painted my bathroom with a leftover can of paint. Beautiful greigey colour, but it's special bathroom paint and has a definite sheen on it.
I know matt paint is the dog's hobnobs at the moment, but will the locals actually suck their teeth when they spot my shiny walls? Or will they think, 'crappy ventilation in here - small children - time for chalky hooha in the next life'?
Incidentally, I did my other bathroom with a can of paint a friend gave me. I didn't even lift the lid or check the colour. As luck would have it, it is the most beautiful heather grey I've ever seen (Dulux Mercury, I think). Now I want to paint my entire house with it 