Could the issue in the OP be something as simple as, he’s got a very linear mind, and if you interrupt him, it throws off his thinking process, which makes him frustrated, so he’s just trying to avoid losing his train of thought? Hell, I’m like that sometimes; I know that if something happens to throw me off, I’ll never get back on track, so I earnestly try to stick to my line of thinking and plow straight through so I don’t forget anything.
It may not necessarily be a “man thing”; I think lots of people are like that. Hell, maybe even mostly men, because sometimes we’re not the clearest thinkers on the fly, so we mentally prepare a whole spiel before we even start the conversation. And when that speech gets interrupted, there just ain’t no way to pick it up again from the middle.
Lemme see if I can come up with an example that makes sense. Let’s say our hypothetical couple has been going over to her parents’ house every night for a week. Let’s say our hypothetical husband is getting tired of going over there and just wants to stay home. Now, this is a delicate conversation, because he wants to get his way (staying home), but he doesn’t want her to think that he just hates her family or something. So, he thinks about it, and comes up with what he feels is a good argument that will allow him to stay home and will also keep the family peace.
So, that night she announces they’re expected at her parents’ house again. He begins his speech. In the middle, she says, “But Cousin Earl and his wife Tanqueray are in town for just one day and they want us to see their new baby!” Well, now his argument is fragmented. He can’t go back and repeat the “it’s been great going over there” part, because then he won’t get what he wants. If he just presses on with, “but I’m just not in the mood for it”, now that it’s logically disconnected from the first part, he comes off like an antisocial jackass. Basically, the whole discussion’s blown.
Now, if this happens to him often enough, he’ll probably come to recognize on some subconscious level that, unless he can make his argument in once piece, he’s gonna lose. The only way he can think to fight back is with a “no interruptions” policy. He still comes off as a jerk, but at least he stands a chance of winning once in a while.
I dunno, maybe I’m just talking out my ass. Does any of this make sense to anyone but me?