Adult puppeteering is the use of puppets in contexts aimed at adult audiences. Serious theatrical pieces can use puppets, either for aesthetic reasons, or to achieve special effects that would not otherwise be impossible with human actors. In parts of the world where puppet shows have traditionally been children's entertainment, many find the notion of puppets in decidedly adult situations—for example, involving drugs, sex, profanity, or violence—to be humorous, because of the bizarre contrast it creates between subject matter and characters.