In my case, the upper part of the sacrum is still functional....as I can walk. However, the lower part that shielded the leg and foot nerves is MIA (missing in action). Any upward pressure from the tailbone (sitting), bending, or twisting, and those nerves get stretched or pinched making sirens go off!
So I have two positions: Standing or reclining. Going from one to the other often causes some wincing and whistling. At night I "sleep in the big bed with Grandma" (I stole that quote from my grandson Nathan), then move to the hospital bed for lounging/computer work, or to the leather bed (lift chair) for some TV time. The mobile bed (automobile with front seat fully reclined) transports us to and from the doctors and on other outings and the movie/book bed with the grand kids..
So the surveys went out, the votes came in, and I was awarded:
How lucky can one guy get?