Can strangulation during sex ever be safe?

Kink, violence, or just another part of sex: more than half of young people are taking part in sexual strangulation. So, what's behind the increase?  And some dissenting Supreme Court judges have warned that US presidents could become "a king above the law" after a new judgment declared "absolute immunity" from some criminal prosecution. Plus, is the cost of regional placements holding back trainee doctors that want to work outside of the big cities? Guests: Kevin J. McMahon, professor of political science, Trinity College in Connecticut Dr Vidhushan Paheerathan, regional doctor Lauren French, sexologist