When you know you have that ho-bag mother nature hating your guts, the good thing about it is that you get a monthly excuse to act however the fuck you want, and the best part is: NOBODY can say a thing.
Become a total bitch? It's not your fault. You're going through a tough time. Skip class/work? It's alright, girl. We understand. Eat an entire pig? Ain't no one in their right mind is gonna judge you. Anyone got beef with you? Give 'em your inherently demonic eyes like, "I'm going to menstruate all over your dead body". They'll know better.
It's like you get a red pass for every single thing you do. After all, who can blame you when you've got biology working against you?
Still, I think I can speak for all women when I say: DAMN YOU TO HELL, BIOLOGY...