An extremely descriptive phrase, full of connotations. And they are all true. Pork sword fighting is practised between two consenting adult males, and consists of, well, pork sword fighting - i.e. taking their appropriate appendages and beating them together for sexual enjoyment.

In Australia, the term was used on national radio in a live broadcast. It slipped through the censorship net, until a high ranking politician enquired a colleague (female) about what it was. She took umbrage to the comment, and the poor politician got expelled from parliament! HA!