Everyone is entitled to an opinion. Yet, some people argue passionately about everything. They enjoy testing the strength of another’s convictions, or else they have a mood disorder. Perhaps they are simply bullies. Or it’s PMS.

Premenstrual syndrome (PMS) has a wide variety of symptoms, including mood swings, tender breasts, food cravings, fatigue, irritability and depression. An estimated 3 of every 4 menstruating women experience some form of premenstrual syndrome.
Quotation from MayoClinic.com, Premenstrual Syndrome

[FYI: Don't argue the fact that 3 out of 4 is almost 75%.]