It will happen, and soon. You thought same sex marriage would never happen, even Obama claimed to be against it, but then it happened. I saw it coming back when I was in law school, in 1994.
Then there was men in the women's restrooms and locker rooms. I predicted this would come more than a year ago and the leftists on this forum mocked my predictions and denied this would ever happen. And then it happened.
The next step is the normalization of adult men having sex with underaged boys. Many leftists are already having sex with underaged boys, and it is very important to legalize it so they don't end up in prison. Child pornography will also be normalized, as we can see with Hollywood's rehabilitation of actor Paul Reubens after his conviction of child pornography possession.