Yvonne, I'm sending you hugs because it is for sure true that in general men take much worse care of themselves than women. Not all men, not all women but in general that's the case.
I also think Cherpep is right on the money. John can't possibly allow himself to consider "what if" anything happens to you...better to bury the head in the sand.
So, come here for support ,dear Yvonne, and of course we will all tell you that you MUST look out for yourself and that includes regular checkups for you too. I hope you are not feeling poorly or anything, just being proactive...don't need two sick people under one roof.
As for the hearing aids situation...