Prostitution does not require money, it requires trade. Trade, or the mutual satisfaction of values or preferences through the exchange of goods or services, is

Prostitution does not require money, it requires trade. Trade, or the mutual satisfaction of values or preferences through the exchange of goods or services, is not a concept that requires much thought to invent. https://www.nytimes.com/2005/06/05/magazine/monkey-business.html https://www.nytimes.com/2005/06/05/magazine/monkey-business....