Such a fetish must surely get in the way of your profession, doctor.
I am aware you are neither a doctor nor do you have a fetish for scratches. I just wished for some humor at your expense.
I am also aware of what you are trying to imply, but I must insist that I am “Doc” Scratch, and not a doctor. Also, I have a complete lack of biology with which to be sexual. The joke is on you.