Huh, heard the same thing during Kindergarten orientation tonight. There were a few others though, such as:
1)Â Girls should wipe front to back and not back to front
2) Boys have a *****, girls have a vagina. It is NOT good to show each other these in the classroom though
3) Picking your nose is not good. Wiping it on the kid next to you is really not good
4)Â Don't be the kid that eats the paste, it's better to be the one that sniffs the rubber cement