I'm a lefty who has grown up in a righty world- I can't keep track of what I do with either hand anymore. I eat & write left, but sports are righty; rotary cutter, cooking-stirring-spoon-side is left...
Scissors, desks, pens, sewing machines, notebooks, ... you name it, it's made for a right-handed person.
It's frustrating, I feel your pain!
Pick up a pen with a business name printed on it- if you hold it in your right hand, you can read the writing. If you hold it with your left it's upside down.
ARgh.