[Doodle.]

An excuse to be lazy
A great excuse if you can't be bothered to go anywhere
You're not pregnant (which doesn't apply to me as I'm a virgin)
Your ovaries are working fine
It's a sign of being fertile
It's funny to mention it in front of guys to make them awkward
An excuse to be annoying
If you're young it makes you feel older
Ummm... an excuse not to have sex if you don't want to

Great tip: If you have a period in school and you feel like crap, ask a male teacher if you can go home early because of it They'll feel awkward and will let you. At least my form teacher did