In your logic obviously the majority of people must be left handed because the left arm being closer to the heart means higher blood flow and thus better stamin

In your logic obviously the majority of people must be left handed because the left arm being closer to the heart means higher blood flow and thus better stamina. Oh but why isn't it so? Because of venom? Let's set our scientists on that. No wait I got one: Attacking prey is easier with the sun in the back so the hunters would often return from the north. The right handed ones would show better muscle tone in the setting sun and we know women select for muscle mass! Sexual selection baby! Way better story I'm sure you agree. Scientists gotta switch.