I have two little boys, and let's face it, nothing is as funny as a comment with a little potty humor. I'm left wondering where this comes from, and why it's so darn funny. Having grown up with a sister, my mother raised us to be proper and polite, but I'm noticing the rules might be different with boys...

Right now, they can say it with their friends, but cannot say it at school with a teacher or after I've announced we need to call it quits. They are good boys and generally very respectful. Is this a battle that I simply should not fight beyond the parameters I've mentioned?