Joseph Frank Smith, a convicted child molester, became an advocate for chemical castration after undergoing the therapy in the s. Castration removes the biological and chemical tendencies that are intrinsically linked to the desire to rape in males. When they did catch him he admitted to the horrible things he did and wanted doctors to study him while he was in prison to find out what caused the sick urges to do horrible things to people After all, many sexual offenders will never reoffend, even without treatment. Also put in general population in prison then we wouldn't have to worry about them ever again. It is terrible what they go through. If chemical castration was added to prison time, accompanied by rigorous counseling and psychiatric treatments, I think it could be a useful procedure. A court-appointed psychiatrist had recommended a longer sentence, stating Gardner showed no remorse, was a very poor candidate for treatment and would be a continuing threat to underage females. What is the percent of repeat offenders? I can't imagine when they get out, what they will do. Making it optional would only work for those who want to change, and most offenders don't want to or don't think they are doing anything wrong. That is the question. MPA-related side effects included excessive weight gain, malaise, migraine headaches, severe leg cramps, elevation of blood pressure, gastrointestinal complaints, gallbladder stones, and diabetes mellitus. Chemical castration may cause some detrimental effects in child molesters. Other risk factors for reoffense include elevated baseline testosterone, previous head injury, never forming a marriage relationship, and alcohol and drug abuse.