Good question

It would have been much worse if you (or he) had said someone else's name. Just saying.

What else could he say?

"May I help you?"
"Present." or
"Do you want fries with that?"

A long-time dry spell makes your erogenous zoon more sensitive.

was his face clamped tightly between your thighs? He probably just didn't hear you.

…so?

Maybe he wanted you to scream his name.

If he ain't used to you calling out his name, he needs to practice making you climax more ;)

Not much of an FML. So your man is a bit slow and confused. Most men are. He gave you an amazing orgasm as you described it and in that situation that is all that matters.