The people in this thread who sleep with no pillows... you all are to be feared.
I sleep with four!
One or two for my head and a couple around me. I've always been used to that. When I was younger I was given more pillows around me to help me sleep, and now I'm just used to it.
They go in various positions, and sometimes I lay on them, but some nights I push most off to the side. It varies.