I had an serious injury (spinal cord) and I had to learn from zero my new body (luckily, I can walk, but I can't feel almost anything around the D).
With normal girl, I had no pleasure, so I decided to see"professional girl" to be able to test what I can do / don't do anymore and what I may like.
Best decision ever! Now I now better my new body, I have new fantasies.
The problem now is to find a normal girl that loves this fantasies... It's quite rare.
So I'd say hobby is for an improvement