Music helps improve mood and relax muscles. When people moved from the farming lifestyle and into apartment buildings, the need for private music became necessary. Headphones give people control over their audio environment. In a dense office space, it is polite to keep our personal space to ourselves. When kids have their own headphones, it allows parents to focus on driving because kids are distracted with their own sounds. When there are multiple kids with each one having a headset, they fight with each other less often because they are each distracted with their own entertainment.