Pacifiers
First Child: When your first child drops her pacifier, you will make sure you boil it for 10 minutes to sterilize to keep her free from germs. You will do this approximately 200+ times a day.
Second Child: When you second child drops her pacifier, you will run it under hot water from the kitchen sink, if it looks dirty.
Third Child: When you're third child drops her pacifier, you will lick it clean. What's a little dirt anyway?
Fourth Child: When your fourth child drops her pacifier, you give it to the dog to lick it clean.
I can't remember who sent me that, or if it's the exact wording, but I thought it was pretty funny. ;-)