Child sex tourism involves traveling abroad to engage in the commercial sexual abuse or prostitution of children, with many child sex tourists being pedophiles who use the internet to plan trips. Exploited children often experience mental and physical harm, including HIV, drug addiction, malnutrition and PTSD. While some countries have taken steps to address child sex tourism through laws and codes of conduct, it remains a problem facilitated by poverty in countries like Thailand, Cambodia, India, Brazil and others.