Haha, we have the same thing in Iceland. It basically turns it into "Two tomatoes were walking across the road when one was hit by a car. The other one said, 'come here you tomato sauce'", which is a terrible terrible joke :)

My daughter messed it up even more and started with "Two tomato sauces were walking across the road..." at which point it's no longer a joke, just a story about a traffic accident...