FWIW...I completely understand what you are saying here. This is something I struggle with, with my LDH too. I can't get him to say anything about sex. If I ask for it I'll often get the "man I'm so tired" before I even finish my sentence.
My H has said....that just because he's stil here I should know he loves me and wants to be here...that's another WTF statement for me. How can I know that just because your physical body is still here...so's mine, and do I look happy? It is absolutely exhausting to get my LDH to talk about sex, in any form....getting him to express an enthusiastic thought about it is pretty much impossible right now. It's something I've told him I need him to do too...It's actually one of the things he could do to keep me around; communicate with me without me having to drag it out of him a syllable at a time.