This is how I help people to understand. At night our body will heat up. Our metabolism is more active when we sleep than when we watch TV. So if someone is on a couch and in shorts and a t shirt, but then goes to bed and needs a huge comforter or anything more than a thin blanket, something is wrong or your bedroom is much cooler. We use blankets because circulation suffers on most surfaces. It restricts blood flow and we get cold. If you have kids and visit them at night they will be burning up to the touch. They are growing repairing and they have exponentially better circulation. Trying to make some kind of excuses about how hot a bed does or doesn't sleep ends up being a lost cause. Ultimately, the general population sleeps on WAY too hard of a mattress. We use too many blankets because we sleep on something without support or pressure relief. Tempurpedic customers are 2 times as likely to never have a problem. This is based on our exchange and warranty info. I for one have never gotten a better sleep than I have on Latex/Foam mattresses.