What does Ethiopia, Senegal and Turkey have that the US doesn’t?
The right to engage in consensual sex for money.
For a list of the legal status of prostitution in different countries, check this nice fact sheet. The oldest profession in the world is legal in most of South America, and virtually all of Europe. Keeping the US company, on the other hand, are countries like China, Saudi Arabia, Iran, Cuba, Uganda (and sadly, India).