BONDING? Really? That's one of the loopiest things I've ever heard. Is this how guys choose their loved ones now? The Fraternity of the Exposed Glans? The shared commonality of being amputees? That warm glow that comes when you realise that your son, too, will be deprived of full sexual sensation as an adult? WHAT IS WRONG WITH THE WORLD???
If your husband feels he can't bond with your son because he has a complete penis, I'd hate to think what it might do to their relationship if your boy ends up with better eyesight than your DH, or a higher IQ, or thicker hair. It's totally selfish for your DH to want your son to LACK something so they can bond about their mutual misfortune. Crikey.
OP, is it possible you've been
too reasonable in your approach? (This is just a wild guess, not based particularly on what you've said, so I could be way off-base.) If you've been presenting this very calmly and factually, is it possible your DH is treating it kind of like a mental exercise rather than a real-life situation? It's hard to explain, but DH does that sometimes. It can take a bit of passion and emotive language on my part sometimes for him to get where I'm coming from. I don't mean ranting like a madwoman

; but if you haven't done it already, why not try busting out some rhetoric? If you clearly say exactly how horrific you find the procedure, compare it to FGM, call it... the things we're not allowed to call it in this forum any more... and emphasise with strong words the fact that it's disfiguring, permanent surgery on an innocent newborn, do you think he might "get it"? Or at least have the grace to feel ashamed about his own shallowness on the issue?
Might be worth a try; might not. I hope you can find a solution, though. I'm livid about his "I'll resent this forever" line - your decision to leave your son's body whole is SO not about him!