Well, you obviously don't pay attention. There is no such thing as a slippery slope. For there to be a slippery slope, there would have to be an "up" and a "down" which would imply a "right" and a "wrong." Since there is no right and wrong, especially when it comes to sexual perversion - I mean fetish - I mean orientation (sorry about the confusion there) then we aren't slipping downhill.
I know it looks like slipping downhill and it feels like slipping downhill but it is definately not slipping downhill by judicial fiat.
Shalom.