Why shouldn't you iron a Four Leaf clover? [spoiler]because you don't want to press your luck[/spoiler] Why shouldn't you buy velcro? [spoiler]because it's a ripoff[/spoiler] What did the rock climber name his son? [spoiler]Cliff[/spoiler] What's the difference between a Jew and a pizza? [spoiler]A pizza tastes better after it's been put in the oven[/spoiler] Yes, I know you said one, but I have more than one good one.