I don't know what else I would expect from a thread that started on such an idiotic statement, but yes, you can say that sadomasochism and unpaid internships are similar in that you can get out of both of them by saying words.

The point is that they are both activities engaged in by two consenting adults.

It's a common belief that one is not the business of the state, but the other one is. My question: what are the exceptions to the "two consenting adults can do as they wish in privacy" rule?

> My question: what are the exceptions to the "two consenting adults can do as they wish in privacy" rule?

(active) voluntary euthanasia is one, though I think it's legal in a pair of US states (Oregon since '94 and Washington since 2008).

I think he was talking about a "rule" of dominant ethics or morality, and not the law, with that question.