Ace married to an aerosexual writing erotica

So, my husband is something like aerosexual. He thinks about sex all the time and now he's writing erotica. He doesn't have a big support system, so he wants to talk to me about it all the time. All the time. And I feel like an unsupportive partner because hearing about all the sex makes me uncomfortable. I kind of shut down because I don't want to encourage it, but as a loving partner I do want to encourage it.

He's usually understanding, but he got a little frustrated with me recently because he knows I read books that had a lot of sex in them previously. I feebly explained that that was a) 20+ years ago and b) I want crazy about that development at the time. I suggested he send his short stories to my best friend who is very sex positive and would be a good sex therapist. Hopefully that helps. He's just so hyper focused on his writing and characters that he can't help but talk to me. And I want to stay updated because it's important to him and he's a good writer and storyteller, but I hate listening to the sex.

Sorry this was a bit of a circular ramble.