Okay, I'm going to be honest and not at all PC here. I, personally, prefer to orgasm with something inside my vagina. If I had a loving partner with ED, I would communicate that use of a dildo or some kind of semi-fisting might be best. Also, many women report that the moment of greatest intimacy in sex for them is the moment of penetration rather than the moment of orgasm. Women like to be f*cked for reasons beyond being brought to orgasm and it's not just a simple matter of being validated for being desirable enough to cause an erection. We are talking about basic primitive desire here. If I had the choice between never getting f*cked again or never getting oral again, I would definitely give up the oral even though it is easier/quicker for me to orgasm with the oral.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver