Watterson admits that Calvin and Susie have a bit of a wild crush on each other ( Said by Calvin , `` It 's shameless the way we flirt . '' ) , and that Susie is inspired by the type of women Watterson himself finds attractive ( which has led to speculation that Susie is based on Watterson 's wife ) . Watterson admits that Calvin and Susie have a nascent crush on each other , and that Susie is inspired by the type of woman whom Watterson himself found attractive and eventually married .