From The Conversation:
When the Athenian politician Pericles delivered his famous Funeral Oration at the end of the first year of the Peloponnesian War (431-404 BC), commemorating those who had fallen during the course of the year, a rumour emerged that his companion, Aspasia was the real author. Other hetairai, like Neaira, were put into the trade as children and trained for a life of satisfying wealthy clients.
The lives of other girls and women reveal the hardships they faced. In addition to hetairai, there were those who worked their whole lives (until they were of no further use) in brothels. The price of women varied according to their age and condition and the quality (or lack thereof) of the business. As the hetairai were trained in the skills required to please men, women in brothels were sometimes modified to suit certain male tastes.
read more here @ The Conversation