Why Do We Really Sleep Under Blankets?

There are just some things we do without thinking, even if they don't always make sense. Plenty of us feel the need to sleep under blankets every night, even if it's the hottest night of summer, and while we might have a half-baked explanation of why we still bundle up when it's hot outside, it turns out that there are scientific explanations for why humans need blankets as well. From the conditioning of childhood to the truth about how cold our bodies get during REM sleep, let's take a look at the real reason why humans need to sleep under blankets.