Grandpa has a habit that drives Grandma crazy. He never washes his jeans! And Brian, his grandson, wants to be just like him. Day after day their jeans get dirtier and dirtier. And the dirtier they get, the more Brian and Grandpa like them. Nothing anyone can do or say can make them change their minds. When the doctor is brought in to reveal all the germs hiding in their jeans, Brian and Grandpa like the funny-looking bugs. When their jeans get so stiff that they can stand on their own, they have a stiff jeans dancing party. Then one day Brian and his grandpa see something that makes them reconsider their actions and decide what is really important to them. Readers will laugh and learn an important lesson along with them.