Also, Mao slept with He Zizhen when Yang was in the jail. His view about the sex probably is close to just personal necessity and pleasure. However he did not share his thoughts with the people. Instead he fooled people to fight each other.
According the book written by Mao's doctor Li, Jiang Qing was quite open when she had sex with Mao. It was sad for them to control the people in a very opposite way.
Thank for the article. I have not seen one like yours.