What's wrong with me ?

I have been sexually active for over 40 years now and as getting off to lesbian sex pornography is all I ever knew in my youth this carried on through my relationships - firstly my girlfriend then wife of 35 years - but now, more worryingly, with the new woman in my life and I’m afraid it’s affecting my performance. I’ve never been able to achieve complete erection and climax without imagining my partner having sex with another woman. I’m not even in my own fantasies. I winged it my wife but now it’s almost like I don’t want to imagine this new woman in my life having sex with another woman. I want it to be with me with me being firmly in the fantasy but it’s almost like I’ve been programmed for so long to get off on what fantasy that I just can’t wean off of it.

Has anyone ever suffered the same sort of thing and, if they have, do they know of any techniques to hotwire my brain into thinking another way ? I’m 59 by the way so it could well be too late for me and I’m on the verge of seeking professional help but just wanted to know if anyone in the community had experienced anything similar first or am I just perverted and too old to change now ?

I would suggest a Sex Therapist would be the best person to talk you through making positive changes on this, as, simply trying to hotwire a different mindset can be almost impossible to achieve on your own …