Addressing the function of third parties on the street and indoors incorporates solid empirical evidence including documentary analysis, 75 interviews with third parties, and 52 interviews with sex workers to unpack the roles and relationships of third parties in three sectors of the sex industry‒ incall/outcall, stripping, and street-based prostitution. Contrary to prevailing stereotypes that portray third parties as inherently abusive and controlling, these workers fulfill important roles and provide vital services as associates, fee-for-service hires, and agency owners or managers responsible for scheduling and arranging transportation and security. The sex industry, like mainstream businesses, rarely depend exclusively on client and worker to operate efficiently, and safely.