It doesn’t take much imagination to guess what a porn video sounds like. It’s more impressive, however, when it’s a computer that’s doing the guessing.
It’s an interesting research topic, but is it too much too late? How long of an audio clip needs to be “heard” by the computer and user before it’s deemed “unwanted pornography?” Comedy wouldn’t fare well, either:
Comedy shows with laughter were also sometimes mistaken for pornography, as the loud audience cheers and cries share similar spectral characteristics to sexual sounds.
One post that I get a lot of hits from search results on is my 
My name is 