Imagine your brain is like a car. Some brains are like old cars, they need more time to start up and run smoothly. Others are like brand new cars that zoom off right away. Lazy people might have slower-starting brains, while energetic people’s brains kick into gear quickly. That's why some people can barely get out of bed, while others seem ready for the day in no time at all.
Examples
- Tom always sleeps through his alarm but loves to play video games for hours without tiring.
- While Tom is still groggy, Sally is already making plans for the day.