WHY is it that when there are only two people living in a house with one loo you can guarantee that both occupants want to go at the same time?

It works both ways, but I'm fed up of hearing footsteps on the stairs when I'm in there. It's so annoying when you can't go to the little room in peace.

Another "It's not just me is it? question": I've been wearing a bra for 40 years (not the same one obviously) and can't understand why nine times out of 10 I put it on inside out first.