Yes, it will wear out the cushion. it will make it flat, just like when you buy a new pillow and a few days later it is flat. it will also ruin the springs. no matter how much you weigh it can break...
As far as I can tell it is something that I have. That being a hard time falling asleep at night due to constant feeling of heating up everytime I start to fall into a deep sleep. Then the hot temp...