I have a friend that always tells you when she is going for a no 2. The reason she does it is to give you the opportunity to go first before the bathroom is smelly (even though she has a) a window and b) air fresheners). She thinks that this is the polite thing to do. She gets her husband to announce it when he is going too.
But I find it so odd, even though I know it is meant with the best intentions. Especially when said to a room full of people!
Is she being reasonable and I am a prude?