The Canadian Supreme Court has ruled that "swinger's clubs" are legal in Canada, and overturned a conviction for running a "bawdy house". Their reasoning?
Consensual conduct behind code-locked doors can hardly be supposed to jeopardize a society as vigorous and tolerant as Canadian society
Or, in other words, what happens between consenting adults in the privacy of their bedrooms, motel rooms, or a private room at a club, is none of the government's damn business - no matter how weird they get or how many people are involved. They've also significantly tightened the test for indecency, from whether conduct "[breaches] the rules of conduct necessary for the proper functioning of society" to whether it causes "actual harm or a significant risk of harm to individuals or society" - effectively a statement of Mill's Law.
This is a welcome judgement - but it's also rather surprising that they'd actually need to make it in the first place...