Of course it should be legal. Whatever happens between two (or however many) consenting adults is no one elses business and it won't harm anyone else. It annoys me to think that things I do in the bedroom or at a playspace could be judged by someone else (who probably has a boring sex life, lets face it people) as being wrong and unlawful. Clearly it's not wrong if everyone involved is having a GREAT FUCKING TIME.
I'm not interested neither in S, nor in M, but I agree with you word by word.
And I heard so many things I failed to understand at all