Habits that are actually signs you're smarter than you think

They like cold showers

You may have heard of the trend of taking cold showers or swimming in cold water to give your body an energizing jolt. Although there isn't a ton of scientific info on this yet, the authors of one study from Finland, where winter swimming is common, note "adaptation to cold water was associated with a significant decrease in tension and fatigue, and an improvement in mood and memory."