I let him read my blog and he said "What's with this DH? Who's DH?" I said, "DH is you, Honey." He said, "What am I, the Designated Hitter?!"
I had to explain it meant "Dear Husband." He was only somewhat mollified. So I asked him if he wanted a different name. He said why not just call him "Big ____" (fill in real name of husband here). I said because then he wouldn't be anonymous. I assume he wants to be anonymous. Since he has not come up with a better anonymous name, he will continue to be DH.
If anyone has any other suggestions, they will be welcome!