Well, it would be interesting, regardless of the perceived abnormalities, to see if we could change the physical response to the psychological stimulus in a bid to stop the natural physical response and alter the psychological response...
I mean, we've kind of already changed the physical response of certain things caused by psychological factors: Take Deep Brain stimulation and its ability to suppress and almost get rid of tremors.
It would be very interesting as if we can change a fetish surely we could use that to rewrite the brains of Kiddie diddlers to make them stop thinking vile thoughts. I mean, a argument could be given as to whether those type of thought should even be corrected morally without the free will of prisoners as something like Deep Brain Stimulation is very invasive.
I mean, as seen with Pavlov's dogs it is possible to change the psychological trigger, however, I wonder if it would be possible to change the trigger in a way that the old trigger would not arise the same similar response or may even lead to repulsion by the host.