Which side of the bed is the left side? Is the answer based on the perspective of laying in the bed (person's head at the head end)? Is the answer based on viewing it from the foot of the bed, looking at the head of the bed? Is there an "anatomical position" or special terminology like in boating for this?
For context:
My boyfriend and I can't agree on this. We change who gets which side based on the shoulder we'd predominantly sleep on and how it's feeling. This let's us get good cuddles before shoulder pain gets irritated. He comes to bed after me. A while back he asked what side I'm sleeping on. I said "left". Later that night, he comes in and almost lays directly on me because he claims "left" is the other side. Since then we have to describe which side using complicated descriptions.
To avoid confusion, just say driver and passenger side.
I meant this to be a joke, but if you assume your bed drives forward toward the side with your pillows then it actually works. But if you read in bed with a reading pillow then I guess you probably want to drive your bed toward your feet side of the bed...
Driver and passenger side confuses me more because of your last point. It's backwards. But it still needs to be named foot of the bed and not head because it's where it feet go. So your first point also makes sense. Both are right and wrong at the same time