What I remember is a very young girl was taken advantage of by a much older man. She was maybe 13-14 and lost her virginity to him. They were together many.
Being friends with a girl that you think about sleeping with on a regular basis is pure bullshit. If there is a high level of sexual attraction between the two of you.
In March 2018, I got taken advantage of by this girl at high school party. I was was kinda good friends with the girl and we had a decent.
The movie Candy is based on this book. I saw the film during it's release in 1969. Everyone thought it was about a teenage girl with loose morals who sleeps.