Given my new position at my workplace, I now have access to all sorts of gadgets and tech stuff.
One thing I've been playing with is a EEG headset with Oculus Rift. My initial idea is to utilize brain patterns with Oculus content to increase certain emotions.
For example, when one is playing Doom 3, the monsters come out closer and scarier when you are already frightened. Or if you're bored, nothing happens to try to increase suspense.
Of course, this could easily be taken to the adult industry. The same feelings of heightened sexual arousal could be coupled with more intense visual stimulation.
EEG is a mess of noise - it's easy to determine things like 'up', 'down', 'left', and 'right'. If you're really precise (user isn't moving very much and has one of those caps that uses electro-gel) you can infer activations of certain parts of the brain, however i don't know how correlated they'd be to non-strong emotions like boredom.
That sounds like some increbily cool work. I'd imagine you can/already use some backend algorithms used by these people. http://emotiv.com/. If you would be willing to mail me the company you work for.
That's precisely why you should. :) Seriously, I and my team and every other #sextech entrepreneur are working to change the public attitude. For the people ahead of the curve - OH MY GOD THE MONEY TO BE MADE :)