RIP. He's better known for his works about people and sex, but I know him from his book "Catwatching", which is a very thoughtful observational study of cats.

The infamous orgasm episode (NSFW): https://www.youtube.com/watch?v=2RkhQsGCXco

Also discussed (22 points) here:

https://news.ycombinator.com/item?id=47841141