Issues with the "main" gun as some guys can view is all related to the stress built up within the man first, and then compounded by health issues second.
The question comes down to expanding pleasure and orgasms in the male partner in a respectful and an emotionally safe way.
It requires some serious communication (ha I know good luck there), and some work.
If a guy as the core element of providing, the key is how to shift the providing into sexual gratification through service. This can have some really good positive things for a woman if it can be focused on her pleasure, which builds the confidence in the guy.
Then work on him after helping him feel pleasure and never initially refer to the failure to launch with PIV. The words and actions and experience bounce in a guys hands for days and weeks and gain power with each failure.
So if we take the last phrase of "who cares", well he does but the question is how to replace his default bias that a woman only orgasmsa and finds full pleasure from deep penetration and male climax within.
You have a good framework for communicating how pleasured you were, but the cut goes deep with a guy when he fails here. Only with time, work and trust can a guy learn to emotionally trust to understand the true intent behind "who cares".
Excellent article and I agree with you on the ED term.
A person having cardio issues with blood pressure problems is ED. Having mental issues because the woman comes in and grabs him away from his desk after four hours of stressful calls at work and then nothing happening ... is not ED. It is a man too stressed to be open with his heart, mind and soul, because he is in fight mode .....