A mustache is a strip of facial hair that grows above the upper lip. It can come in various styles, from thin and neat to thick and bushy. Many people choose to grow mustaches for personal expression or as part of a specific look. Some famous mustaches belong to celebrities like Tom Selleck and Albert Einstein, who are known for their iconic facial hair. Mustaches have a long history and have been worn by different cultures around the world. In some societies, they symbolize masculinity or maturity. Today, mustaches are often celebrated during events like Movember, where men grow mustaches to raise awareness for men's health issues.