Women actors sometimes act the roles of young boys, because in some ways a woman is more similar to a boy than a man is. For example, a woman usually plays the role of Peter Pan. In pantomime, a sort of play for children (not the same as mime), the most important young man is also a woman. Opera has some "pants roles" which women traditionally sing. These women are usually mezzo-sopranos, which means they sing with a voice that is high but not very high. Examples are Hansel in "", and Cherubino in "The Marriage of Figaro".