I have at least eight. I can NEVER get enough pillows!
I surround my whole body in pillows when I sleep. I wrap around them, have them tight to my back, and prop my legs and feet up on them. I also have pillows out to the sides of me. This way I can lay on either side, and I'm able to extend my arm out, and prop it up on a pillow. If I don't prop my extended arm up, I will wake up with a sore elbow, the same way it feels when you sleep with your arm hanging off of the side of the bed.
Pillows rock! But they do cause girlfriends to get jealous, that I am not cuddling them instead, and that the pillows create a gap between me and them.
So in some cases, my best friends, "pillows", end up "c@#$ blocking" me! haha.