It must have taken some brass ones to initiate that convo with your H. Kudos to you for opening up what must be a very painful topic for you.
I have been LD up until very recently. I'm hoping my experience might shed some light on your Hs reaction to your dialog about sex. In my past, I could talk about sex in a general way or listen to someone else talk about theirs, but ask me a pointed question about mine, my stomach would start to growl, my heart would begin to pound, and I would begin to sweat, my ears would ring. Squirming was the physical manifestation of all these sensations happening at once. My body would be in such an uproar, physically, that it made it nearly impossible to talk about it. This wasn't a reaction to a particular person, but a reaction to having a conversation about sex. It certainly was childlike/ish, in my case it was completely involuntary. If I participated, the physical sensations would increase.
Is he squeamish about all physical touch? Is this the only issue that he responds in this manner to?
I don't mind the sun sometime
The images it shows
I can taste you on my lips
And smell you in my clothes
Cinnamon and Sugar
And softly spoken lies
You never know just how you look
Through someone elses eyes
BHS-"Pepper"