My wife, son, and daughter each use one. Not for me - reminds of the time in high school when this girl who was way bigger than me tripped and ended up knocking me over and falling on top of me. She didn’t move for a while and I couldn’t get her off and the life was being sucked out of me.
Furthermore, the majority of my dreams involve me being a ninja, a street brawler, or assassin. I need to move freely when I sleep. :hihi: