We've done it all our married life, almost 38 years. During the middle of the night when I get up to pee, we switch sides of the bed. For me, it would seem strange to wake up on my side of the bed.
When we told our married kids that, they seemed to think that's really a strange habit. Like how can our brains handle the switch of positions? It's better than taking the natural sleep aid melatonin.
There's something comforting about changing sleep positions. My sleeping psyche sees the world from a different position.
How many of you own your sleep positions and would change for nothing and no one? You have your side and you laid claim to it early on.