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Piquerism or picquerism (from the French piquer - "to prick") is sexual interest in penetrating the skin of another person, sometimes serious enough to cause death. Piquerism is a paraphilia. The most frequently targeted areas of the body are the breasts, buttocks, or groin.
Jack the Ripper
Dr. Robert D. Keppel and his colleagues concluded in an analysis of London's Jack the Ripper murders of 1888 that "the injuries sustained by the victims displayed the signature characteristic of picquerism."
Notorious serial killer Albert Fish has been said to have engaged in piquerism upon his victims and his own body, flagellating himself constantly with a nail-studded board. After his arrest and subsequent jailing for the murder of Grace Budd, an X-Ray revealed at least 29 needles that were inserted into his groin.
- Keppel RD; Weis JG; Brown KM; Welch K (2005). "The Jack the Ripper Murders: A Modus Operandi and Signature Analysis of the 1888-1891 Whitechapel Murders". Journal of Investigative Psychology and Offender Profiling 2 (1): 1–21. doi:10.1002/jip.22.
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