Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Washing out mouth with soap is a form of corporal punishment. It is most commonly administered to children for actions such as cursing, lying, or talking back. It is considered symbolic of cleansing out a dirty mouth but is used primarily because some people feel that the foul taste of soap is an effective deterrent to unacceptable behavior. It was a common method of punishment in the first half of the twentieth century but has declined in popularity significantly since the 1960s. Historically, it has been practiced primarily in the United Kingdom and United States. Today it is a controversial practice, with some parents, child experts, and other persons who spend time around children practicing and/or advocating for it, others refusing the practice, and some even opposing its use by others. Opposition to this punishment has grown in recent decades as its use has declined.