I find that we have wwaaaay more sex during the day than we ever had. Sex was always a thing that was done after everything else was done, kids in bed, last activity. Doing it like that was becoming hard since I'm so wore out at the end of the day. So now we have plenty of daytime sex. It's all changed for me, but I have to keep trying. I don't have ED yet, but I have anorgasmia, or inability to achieve orgasm.
So to your point, I do get wore out, after all it does require exertion, but not going into the next day like exercise or having a long day at work will do.
Ditto on all of Lew's points. He and Jeff are in a very similar MS pattern, with bladder issues, fatigue and all that goes with that. Since you're a partner like me, Ken...I've found that I have to be REALLY sensitive to Jeff's moods and energy levels, by having the antennae out. Jeff works at home, we're able to take daytime hours for each other, which has been really helpful. He can get a catnap after sex. His energy level is usually better afterwards- the endorphin rush helps his mood. No change in his disability, and his spasms are better after, but we do turn up the airconditioning!
Hope some of the gals with MS log in and give you feedback. Like I've said before, Kim's a lucky woman.
Husband dx RRMS 3/07
dx dual jugular vein stenosis (CCSVI) 4/09
dual stents placed 5/09
CCSVI in MS