The Indecent assault reference article from the English Wikipedia on 24-Apr-2004
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Indecent assault

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Indecent assault is defined by law as any unwanted sexual behaviour or touching which is forced upon people against their will.

The meaning of indecency depends upon prevailing views of what is unacceptable behaviour ( Law reform Commission 1987). This might include behaviour such as forcing someone to watch pornography or masturbation.