Unusual hobby noted

Well, I like to have a craft beer at West End in Brisbane every now and then, but it is a pretty bohemian suburb, and if I had to pick an area in Brisbane where this activity was most likely to happen, it would either be there (or the sleazier Fortitude Valley, I guess):

Police went to the West End flat of electrician Ryan Andrew King, 27, in inner city Brisbane while investigating a bizarre mutilation last weekend.

Police and paramedics were called to a city backpacker hostel last Saturday night where they allegedly found a 26-year-old Sydney man with his genitals partly removed.

It is alleged the man had arranged to be partially castrated by Mr King in one of the rooms, after meeting online.

Mr King, who works as an electrician at the Queensland Performing Arts Centre and has volunteered in the SES, is not believed to be medically qualified but allegedly taught himself castration from online research.

It is alleged he may have used a Cryopen, a device for removing lesions such as warts and benign skin spots with nitrous oxide under high pressure.

After finding the allegedly mutilated man at the hostel, police searched Mr King’s West End apartment and allegedly found a human penis and set of testicles in his freezer.

Here's an abstract from a 2004 study in Archives of Sexual Behaviour (sounds a fun journal) about this weird fetish/interest: 

We used a survey posted on the Internet to explore the motivation of men who are interested in being castrated. Out of 134 respondents, 23 (17%) reported already having been castrated. The 104 (78%) individuals who said they had not been castrated were asked why they wanted to be castrated and why they had not actualized that desire. They were given multiple-choice answers to select from. The major reason (selected by 40% of respondents) for desiring castration was to achieve a “eunuch calm” and freedom from sexual urges; however, a large proportion (∼30%) of respondents found fantasies about being castrated sexually exciting and a similar percentage desired castration for the “cosmetic” appearance it achieved (which we interpret to mean scrotal removal along with an orchiectomy). This high interest in castration as either a sexual stimulus (a fetish) or a cosmetic enhancement was unexpected and contrasted with the more classically stated motivation for voluntary castration in the psychiatric literature, i.e., libido control and transsexualism. Internet discussion groups that serve these men may encourage them to act out their castration fantasies. Alternately, Internet discussions may give them a displacement outlet for their fantasies and decrease the risk of castration by nonmedically qualified “street-cutters” or by self-mutilation. Forty percent of our respondents claimed that they would have an orchiectomy, if it were cheap, safe, and simple. A quarter wanted to try chemical castration first, but 40% were embarrassed to talk to their doctors about their interest in castration. Information now available on the Internet provides these men with increasingly easy access to street-cutters and directions on how to perform surgical castrations, putting them at risk of permanent injury and disability. Physicians need to be aware of these risks.