Yeah, sciatica freakin' HURTS. Like someone shoving a knife in your butt. Or grabbing your hindparts with a pair of pliers.
I was the World Champion Sloucher before. When I showed my wife how I sometimes sat before the sciatica struck, she said I kinda deserved it, because human beings weren't meant to sit on the back of their neck!
She was right, of course. My posture is much better now. I make bloody sure about that.
Craig