In a Nutshell - What a period is

"What's a period?"

It's when a uterus isn't able to successfully conceive because of a lack of mansauce so it cries bitter pre-abortion tears.

"What's a period?"

It's when the Uterus Conceptionist Union's demands for the development of a new Person project falls in the deaf ears of the Brain, so a protest is organized in front of the vagina area, making the welcoming of foreign guests difficult.