Child prostitution is prostitution involving a child, and it is a form of commercial sexual exploitation of children. The term normally refers to prostitution of a minor, or person under the legal age of consent. In most jurisdictions, child prostitution is illegal as part of general prohibition on prostitution. Child prostitution usually manifests in the form of sex trafficking, in which a child is kidnapped or tricked into becoming involved in the sex trade, or survival sex, in which the child engages in sexual activities to procure basic essentials such as food and shelter. Prostitution of children is commonly associated with child pornography, and they often overlap. Some people travel to foreign countries to engage in child sex tourism. Research suggests that there may be as many as 10 million children involved in prostitution worldwide. The practice is most widespread in South America and Asia, but prostitution of children exists globally, in undeveloped countries as well as developed. Most of the children involved with prostitution are girls, despite an increase in the number of young boys in the trade. All member countries of the United Nations have committed to prohibiting child prostitution, either under the Convention on the Rights of the Child or the Optional Protocol on the Sale of Children, Child Prostitution and Child Pornography. Various campaigns and organizations have been created to try to stop the practice. Definitions Several definitions have been proposed for prostitution of children. The United Nations defines it as "the act of engaging or offering the services of a child to perform sexual acts for money or other consideration with that person or any other person". The Convention on the Rights of the Child's Optional Protocol on the Sale of Children, Child Prostitution, and Child Pornography defines the practice as "the act of obtaining, procuring or offering the services of a child or inducing a child to perform sexual acts for any form of compensation or reward". Both emphasize that the child is a victim of exploitation, even if apparent consent is given. The Worst Forms of Child Labour Convention, 1999, (Convention No 182) of the International Labour Organization (ILO) describes it as the "use, procuring or offering of a child for prostitution". According to the International Labour Office in Geneva, prostitution of children and child pornography are two primary forms of child sexual exploitation, which often overlap. The former is sometimes used to