Hotbed by John Carver

'He came to a typical provincial town to record the sex habits of the residents, and uncovered secrets hidden below the surface of prudish convention that were a network of sexual entanglements. His research on sex put him on intimate terms with beautiful girls like Carol, who went from one man to the next in a desperate search for satisfaction, and never failed to be disappointed. He knew the tragedy of Beatrice, left alone with her lurid fantasies while her husband accused her of frigidity and spent his time with whores. He watched a young childless couple throw themselves into affairs with other partners, because their barren marriage was breaking them apart. The doctor who thought he knew everything about sex, soon realised he had a lot to learn!'