Yeah I definitely see your point, very funny story indeed! I suppose what I'm wondering about is how in Agile, scope/requirements can change, while the fee and timeline is set from the beginning. That is certainly something that would change the client's way of perceiving the whole project from the start...and I don't see how another pizza analogy would fit in here. "OK, actually I want it to be vegetarian instead of pepperoni"; "But it's already in the oven."