This is serious and not a joke, but, I have fantasies about having sex with my father, and also masturbate to incestuous porn of a father and daughter together. I am not physically attracted to my father at all, in fact when beside him, the thought of doing anything in appropriate would be disgusting, it is only when in a sexual position that I get the urges and I imagine us doing stuff together. I don't suppose someone can provide me with a reason for this?