I don't think it is a delusion to feel toward one's male T as one would feel toward a father (and enjoy that feeling :-) But your T can't "cure" you, even if he were your father or the best T in the world; only you can. There's nothing to be gained by enjoying the fantasy of a relationship that can't exist? I spent 10-15+ years in a fantasy of my own making and it is sad that that many years of my life are "gone" with not a whole lot to show for them. I wish I had spent those years struggling with reality instead of fantasizing so I wouldn't get so use to fantasizing and have to fight against that habit even now, 30+ years later.