Mr Jones said attitudes to homosexuality were still incredibly negative during his youth in the 1960s, despite it being decriminalised in 1967.
"The idea was that I would link the negative shock with the homosexual pornography and the freedom from shock with heterosexual pornography."Mr Jones' recent prostate cancer diagnosis has made him think about how he has never been given an apology for what he suffered For a decade, until he was 28, Mr Jones suffered symptoms similar to post-traumatic stress disorder and he said he was unable to have a healthy sexual relationship.He said: "I put all of my energy into academic study and whilst there I had the opportunity to have therapy that was gay-positive, which allowed me to unlearn a lot of the negativity I had learned or absorbed as a child, and I was able to regain a sense of myself.
"How do you police quiet conversations which try and influence change in family homes and religious establishments? It would be a nightmare," he said.