I would get some heavy weight denim for the bed covering two layers thick. They make these devices that you can get at pet stores that schlock the dog when they step on the. Mine has three settings that adjust the intensity of the shock. And after a while the dog won't even bother going on the bed.
My dog did the same thing and I would find all the pillows making a square. He likes to lay facing the door. I had to buy a cage for him as he chewed the carpet one day, the carpet wasn't even a year old. Today, after my mid-afternoon nap, I found the couch pillow in the kitchen. I guess I need to make him his own pillow.
If he tries the shock device, then get Hoody his own bed pillow and have your son roll all over it on occasion. Hoody just misses his daddy.
Funny story about the shock pad. We had it on our couch and a friend came over for dinner and we tend to eat in the living room to watch the tv. Anyways, he sat on it. I was surprised that he did not spill his dinner when he flew up. We all laughed so hard. I asked him about the shock and how bad it was. He said it was lick sticking your tongue on a nine volt battery that was almost dead. I was worried that I would hurt my babies.