To hide undesirable odors or to look "unscented," certain items are perfumed with industrial odorants. While aromatic liquids for the body are commonly referred to as perfume, genuine perfumes are defined as extracts or essences that contain a percentage of oil distilled in alcohol. Water is also employed. The term "cologne" means simply "alcohol perfume." "Aftershave" is used to describe a scent worn by men following the use of hair products. The word "perfume" comes from the Latin phrase per fumum, meaning "through smoke." This refers to the ancient practice of burning incense to honor the gods and seek their help. Incense consisted mainly of fragrant woods such as myrrh, cinnamon, and cassia, which were burned in sacred places to give off an aroma that would please the gods. In modern times, perfume has become a form of luxury dressing. It can be applied directly to the skin or inhaled through fragrance oils or sprays. The history of perfume begins with nature's most effective insect repellent-the smell of plants that attract little interest from humans but big deals from insects-and turns it into something special for humans to enjoy. Perfume contains several ingredients that provide smell. They include alcohol, essential oils, natural colors, and spices. Some examples of popular alcoholic perfumes are Fracas, Jicky, and Arpege.