Prostitution in Benin is legal but related activities such as brothel keeping and benefiting from the prostitution of others are illegal. UNAIDS estimates there to be about 15,000 prostitutes in the country. Most of these are migrants from neighbouring countries, mainly Nigeria, Togo and Ghana. Only 15% of the prostitutes are Beninese. Prostitution occurs on the streets, in bars, restaurants, hotels and brothels. With advent of the smartphone, many prostitutes use apps to make arrangements with clients. HIV, sex trafficking and child sex tourism are problems in the country.