Interestingly since solving the ED problem my H is more wiling to use other positions so maybe it is a bigger factor than you realise.
Another common factor was that my H was better with oral sex until he "lost" it during that and really that was like the kiss of death after that happened.
It is fine to say a responsible adult SHOULD be willing to satisy his wife in various ways but where ED is in play the REALITY can be very different.
Dom just because you have a penis does not mean that you know how it feels when it stops functioning or indeed how you would react. You may THINK you would be happy to satisy your wife in other ways but REALITY may well be different.
Good luck Karen hope things do improve for you!!!!