Charles: Oh, God. I’ll just live inside your trousers or something. It would be much easier!
Camilla: (Laughing) What are you going to turn into, a pair of knickers? (Both laugh). Oh, you’re going to come back as a pair of knickers.
Charles: Or, God forbid, a Tampax. Just my luck! (Laughs)
Camilla: You are a complete idiot! (Laughs) Oh, what a wonderful idea.
Charles: My luck to be chucked down the lavatory and go on and on forever swirling round on the top, never going down.
Quite right, here is the actual segment of the conversation.