Lip care is an essential part of almost every woman's beauty routine. In today's market there are countless numbers of colors for a woman to choose from. Sociologists performed a recent study in France, which showed that a waitress who wore red lipstick earned bigger tips. The catch? It was only from male customers. An interesting fact about lips is that it is only humans that have a distinct border between the skin of the lips and the skin of the face. It is referred to by scientists as the "vermilion border". Did you know that it takes four muscles to pucker up or to contract your lips to whistle, for example? Those group of muscles are known as the orbicularis oris. Watch the video to learn how to add color to your vermilion border.