this rule states that no man should ever know when a girl is on the rag. (similar to the rule 444, girls dont poop). this rule implies that periods are not real and are lies. (guys dont like to think about them therefor we do not ever EVER).
girl- i cant have sex tonight
dude- why not baby
girl (acting as if we have heard or should know this befor hand)- im on my period
dude (now knowing that smell wasent a nasty fart and having self realization that she has blood and stink comming from her baby hole)- AHHHHH respect rule 444-p
dude (mentally vomiting now knowing that he has the girl out of all of them that dose this)- guys dont know untill you tell.