Conversion therapy consists of methods used to alter an individual’s sexuality, predominantly from homosexual to heterosexual. While conversion therapy is currently ineffective, the advances of neuroscience mean this may change (Earp et al 2014). As effective conversion therapy may reduce the suffering of gay people, then so long as it is consensual conversion therapy may be ethically acceptable. There are two main counterarguments. The first is that given the maltreatment of gay people, conversion therapy cannot be truly consensual (Cruz in Earp et al 2014, 9). The second – the focus of this presentation - is that effective, truly consensual conversion therapy harms the Queer community (Behrmann and Ravitsky 2014; Gupta 2012) and so is unacceptable. The presentation considers the tension between an individual’s autonomy to make choices that benefit themselves and limiting autonomy to minimise harm to the community (in this case, the Queer community.)