Via reddit is a great post listing the back and forth emails between a designer and "client". Well, sort of client. Just please go and read it now. An excerpt :

If I did have a working time machine, the first thing I would do is go back four days and tell myself to read the warning on the hair removal cream packaging where it recommends not using on sensitive areas.

While it doesn't have anything to do with logos and pie charts, it's a nice sample of the humor in the emails. Just go and read it ok? :)