I too am ambidextrous and can do most things either right or left handed, including writing cursive. Strange human trick alert.....
I can write with both hands at the same time. Both are legible and fairly similar. But I cannot write different things at the same same time.
One thing that I've noticed in this thread, is that there are quite a few shavers on here that are disabled. My hat is off to you gentlemen for saying yes, I can.
And just to clarify, I am not disabled. My injury was a dislocation to my elbow when I was younger. Everything functions normally, but I do get tingles in my left hand if I do repeated actions.