“Prostitution is said to be the world’s oldest profession.”
It is, indeed, a model of all professional work: the worker relinquishes control over himself … in exchange for money. Because of the passivity it entails, this is a difficult and, for many, a distasteful role.
Source: The Second Sin (1973), p. 45.
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Thomas Szasz 70
Hungarian psychiatrist 1920–2012Related quotes

“The two oldest professions in the world — ruined by amateurs.”
On actors and prostitutes, from his column, as republished in Shouts and Murmurs: Echoes of a Thousand and One First Nights (1922), p. 57.

The computer scientist leaned back in her chair, smiled, and then said confidently, "Ah, but who do you think created the chaos?"
Source: Object-oriented design: With Applications, (1991), p. 2

Remarks at a business conference in Los Angeles (2 March 1977)
1970s

“The world's oldest globalist institution? Catholic church.”
"The Remnant Tapes" https://web.archive.org/web/20180914075854/https://theremnant-tapes.nationalreview.com/theremnant-060-09.13.2018.mp3 (13 September 2018), National Review
2010s, 2018

#106, Part 2
Twenty Seven Thousand Aspiration Plants Part 1-270 (1983)

[Bagger, E. S., Eminent Europeans; studies in continental reality, G.P. Putnam's Sons, 1922, http://www.archive.org/download/eminenteuropeans00bagg/eminenteuropeans00bagg.pdf], p. 61