Ladies, if you haven't had a guy condescendingly explain something obvious to you that you already know, you must live on some sort of sacred island populated only by women. Your periods are so synced, Mansplaining cannot penetrate your consciousness. For the rest of us, there are a few alternatives: running away screaming, politely telling them you know that already and getting called a bitch, or the new product introduced in this video:

Sources: Alicia Menendez