The signs on their PERIOD
Aries: There will be blood, like bloody mess.......
Taurus: the only way you can really tell they're on their period is when the kitchen cupboards are all empty.
Cancer: Buys an extra 12-Pack of tissues and sets it near the bed for a good cause.
Gemini: Everybody, including their mother, will get a reality check and a slap in the face.Leo: the gray cloud they secretly carry around, becomes visible and they become very pessimistic.
Virgo: they are ready for this shit; stand back Mother Nature because the Virgo has boxes of chocolate, boxes of tissue, and a bunch of chick-flick movies all within reach.
Libra: "If a single person disagrees woth me, I kill them."
Scorpio: attempts to kill you and will not admit to it
Sagittarius: "Don't test me, or you'll be the one crying, not me."
Cancer: has a girls night out planned out for this because they can have an excuse and will spill all of their heart's troubles.
Aquarius: MIA. Missing in Action. And it'll remain a mystery.
Pisces: they can be the sweetest person, but if this time of the month comes anything can be thrown on your way; knives, harsh words you thought you'll never hear from them, who knows....