Procuring, pimping, or pandering is the facilitation or provision of a prostitute or other sex worker in the arrangement of a sex act with a customer. A procurer, colloquially called a pimp or a madam or a brothel keeper, is an agent for prostitutes who collects part of their earnings. The procurer may receive this money in return for advertising services, physical protection, or for providing and possibly monopolizing a location where the prostitute may solicit clients. Like prostitution, the legality of certain actions of a madam or a pimp vary from one region to the next.