Evaluate Ethical in research studies

What are some of the ethical issues surrounding:

• The Tuskegee Syphilis Experiment
• Tearoom Trade: Impersonal Sex in Public Places, conducted by Sociologists, Laud Humphreys
  • Must include at least 2 specific examples for each case and explain why they are ethical issues.
  • 
    https://www.cdc.gov/tuskegee/timeline.htm
  • https://www.lehmiller.com/blog/2012/10/3/tearoom-trade-and-the-study-of-sex-in-public-places.html