Left handedness

Okay so I over-browse the internet 😂 but I came upon a theory that most left handed people probably had a twin that died early on. The left handed person being the stronger fetus and survivor.

I think it is based of the idea that twins are usually one right-handed and one who is left-handed. So it dawned on me, since I'm left handed, maybe my fraternal twins I am currently pregnant with aren't as random an event as I first thought? Maybe my mother had a twin pregnancy briefly. Is this craziness? And twin mamas, what is your twins handedness? Curiosity is killing me right now.