Matthias Foellmer of Concordia University in Montreal and Daphne Fairbairn of the University of California, Riverside, believe they have found at least part of the answer.

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It is thought that Lin, who was studying engineering and computer science at Concordia University in Montreal, had been in a relationship with the man suspected of killing him.

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Jim Pfaus, who studies the neurobiology of sexual behaviour at Concordia University in Montreal, Canada, said he thought there would be a big demand for the new device despite the fact that it involved surgery.

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"We won't see such garments in stores for another 20 or 30 years, but the practical and creative possibilities are exciting, " said Prof Joanna Berzowska, of the Department of Design and Computation Arts at Concordia University in Montreal, Canada.

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Still unsure of a career path, in 1990 he enrolled in Montreal's Concordia University to study geology.

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