The Sartorial Rule states that one should never, ever, wear plaid with polka dots. But, of course, there are exceptions.
Exceptions to the Sartorial Rule
Striped Socks and Scarves: The Sartorial Equivalent of a Time Bomb
Pleats in the Wild: A Guide to the Sartorial Exception that is You
Splattered Chaos: A Sartorial Exception for the Unruly Fashionista