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.
In medicine you use the view of the examiner like your boyfriend. I don’t think that is reasonable for the people lying down though.
So using the point of the examiner, is the mattress the belly or back or the bed? I say it’s the belly, the baseboard would be the back. So it would be the same as laying in the bed.
I might have gotten things messed up because I am not a medical student. Apparently the swap happens only for MRI and similar things where the picture swaps the coronal plane.
If you want the explanation for it search for sagittal and coronal plane. It gives you a way of talking about bodies independent of rotation.