Like many, I saw the TV series before I read the book. There are many similarities, but many more differences. The book was good but I'm struck by what a good job they did adapting the novel for the small screen. Two entirely different tales in the end since most of the characters have different motivations. While many share names, they have entirely different roles. The important observation being, if you've seen the show, it's still worth reading the book. And if you've read the book, the show tells a version of the story that's nearly independent and well worth your time.
I get that he's been locked up for a long time and is really horny, but that's about all I've taken from this book. It takes place in some vague, sci-fi / medical tech world but I can tell you more about what this guy thinks of sex than I can tell you about the whole world this book exists in.
If I wanted to read about sex, I would get some erotica. I wanted sci-fi and this just didn't do it for me.