Honestly, there are two ways it could go:
1) He's (and by he I mean "Isis," I use fact-based pronouns) an AGP fetishist of some flavor and he genuinely perceives the sex to be better because it is fulfilling his fetish / the mental component is there. Mentality and emotion are
hugely important in good sex (typically) - if your focus is on how this isn't perfect because your husband is fucking you up the ass and not in your non-existent vagina, the sex isn't going to be very fulfilling for you. But if you're a misogynistic autogynephile who feels that he's finally being "treated like a real woman" (because these dudes
always think a woman's sole purpose is to be fucked by men

) because he's getting penetrated in the wound-hole with a penis... you're probably having a good time even if you barely have any sensation left down there.
2) He's lying his ass off, as he feels the need to tell himself that the sex is fabulous and amazing (probably using as justification "well my husband sometimes orgasms when he can sufficiently pretend my gaping wound full of shit bacteria is an asshole"), because if he doesn't he has to admit that he destroyed his body and his sex well past the point of no return and it was all for nothing.
I feel bad for his husband. Imagine being hooked up to a narcissist so severe that he makes you get up on a stage and claim to be "gay with an exception" when you're still
literally married to a man. That poor dude has to be up there acting like a poster-boy for conversion therapists ("look he
did find the 'right woman'! gays
can have exceptions!") when, again, he is
literally married to a whole ass man. His head must be ready to explode at all times.
ETA: A bit of googling seems to indicate that "Isis" is currently single, so it looks like his husband couldn't keep up the charade. Good for him, honestly.