So, it seems SSRI drugs can be used as a milder form of chemical castration for sex offenders:
"In many countries,medication plays a central role in the management of high risk sex offenders, which in some cases can be made a compulsory condition of release to the community. The notion is that reducing sex drive in sex offenders lessens the likelihood of further sexual aggression. It may surprise some, therefore, that risk reduction is not the primary aim of the ‘Medication to Manage Sexual Arousal’ programme (MMSA) currently being rolled out by the OPD pathway.One of the principles underlying the OPD pathway is thatreoffending risk is best managed in the criminal justice system. Doctors, however, inhabit health systems where they treat patients who, except when capacity is lost or in some instances of mental illness, consent to the treatment they receive. This is as true for individuals with personality disorder as it is for anyone else.MMSA is designed for sex offenders who seek help to manage their sexual arousal and who agree to take the medication prescribed for them.Unlike treatment protocols elsewhere which tend to be based on risk, with higher risk offenders prescribed more potent and intrusive medications, in MMSA medication is prescribed depending on the medical indication. Where sexual rumination and compulsive type urges are the issue,an SSRI may be prescribed (drugs like Prozac, which reduce the intensity of fantasy, urges and sexual enjoyment), even in high risk sadistic offenders...."