I did not watch this, nor read the other comments, but just want to contribute something to the discussion that is often overlooked:
The "rightness" or "wrongness" of the behavior has a lot to do with who you are and why you are doing it. Straight men engaging in homosexual sex strikes me as unnatural.
What these discussions often miss is whether or not the people engaging in the behavior are straight or gay, faithful or unfaithful, loving or hating, and have a contract with each other (contracts require a meeting of minds, i.e., that both parties understand what is agreed to; no minors, drunks, coma patients, etc., and no fraud).
Literally, the thought of sex with any of the 100 people nearest to me at this moment is equally disgusting and wrong.
Hypothetically, because I'm straight, I'm repulsed by the idea of sex with my own gender, but since the bulk of men, hypothetically, aren't that appealing, either, it becomes obvious that this comes down to individuals and their relationships, and making a sweeping rule ignores our individuality.
It's time we stopped worrying about what other people are doing, and focus on our own relationships and how we conduct our own lives.
What do you think? http://consequeries.com/