Fun intricacy #3: PMS
What it is: PMS stands for premenstrual syndrome, which shows up roughly a week before menstruation starts while a female's hormones are in flux. This can cause a wave of symptoms that include but are not limited to: fatigue, bloating, nausea, headaches, acne, cold or flu-like symptoms, and mild mood swings or depression.
What it means for a girl: Sometimes it can mean intense ice cream cravings at midnight. Sometimes it can make you a little weepy if you see an old person crossing the street. Sometimes it makes you just slightly more tired and slightly more invested in Shark Tank reruns. But historically, it means women have been marginalized and called "crazy" or "wild" creatures who have no control over their brains, resulting in a long history of sexism, misogyny, and discrimination in the workplace and on the home front.