He is rather embarrassed about this but certainly glad he got it off his chest. See he's been doing this since he was a wee little one. I thought neutering would help, but negative houston. It was still all systems go for him whenever he was faced with a soft blanket, pillow, or large stuffed animal. So now its management, if he's left alone in the vicinity of my pillows - my pillows get picked up and put where he can't reach them. Simple enough...until the day comes when you don't remember! Insert evidence here :).
Luckily, (if you can call it luck) he prefers my memory foam pillow. At least, it doesn't totally ruin the pillow. I can just throw away the pieces and put a new pillow case back over my pillow. Viola! Almost as good as new, just a bit dented in the corner :).