[DiogenesLamp]

Yes, most of his later years books were sex oriented.

Read, I Will Fear No Evil, 1970.....................

https://en.wikipedia.org/wiki/I_Will_Fear_No_Evil

I think the interjection of sex into science fiction stories usually does nothing to benefit the plot, and serves mostly as a lurid distraction.

Nowadays people are dead set intent on interjecting homosexuality into a lot of science fiction plots, as well as other social justice warrior crap.

Some character's race, sexual orientation, or religion usually has no bearing on the character's role in a story, but for some reason people insist on putting a focus on this stuff.

[Red Badger]

I remember Isaac Asimov talking about being criticized for NOT putting any ‘sex’ in his sci-fi novels, circa 1970’s.

He said it wasn’t necessary to the stories, and didn’t like to write about it....................

[Simon Green]

Here's a bit of trivia: Remember the classic 1955 Heinlein novel, "Tunnel in the Sky"? The main character is black, despite all cover illustrations to the contrary.

It's easy to miss, because it has nothing to do with the plot.