How do you interpret this Beautiful South song?

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I"m whiling away time on a car journey. 'You Keep it all In" by The Beautiful South came in the playlist and DH and I have been discussing the lyrics. It's obviously about emotional repression, particularly in men, but the lyrics also have a dark side. The conversation starts with the female voice accusing her male partner of not being open, it then progresses towards him possibly 'confessing' dark secrets from his past. But its not clear if he's being serious or sarcastic/jokey, or just talking about things he's witnessed or seen in the news. I haven't been able to find anything online that explains that part of the lyrics. Interested in opinions.

Summarising:

1. The female tells the male that his problem is that he keeps everything in.
2. He responds by recalling a conversation in which he wanted to kill the female, but didn't express it.
3. We get the husband preparing to fight and the frightened daughter who hears it but also keeps it in.
4. Then come the murder in '73 and robbery in '62.
5. He says that last week the female gagged and bound him to a seat.
6. These are immediately followed by the speaker's statement that these are things that have happened to him and that he has kept inside.

I think Heaton loads his songs with irony. Not to be too deep but Chaucer was doing the same centuries ago.
I think he is in fact quite scathing of MANkind in his lyrics.
but I’m a superfan, so take my comments with a shovel of salt!

The video may help!

I've always interpreted this song as simply messing round with an idea - male emotional repression - and then comically extending it into interrogation, because of the tangential relationship between the two ideas.

Perhaps, and I'm just speculating, it begins with the female experience of talking to a closed off husband and then moves to an exaggerated comic version of how a closed off husband feels talking to his wife.

Either way, I've always imagined that "You know your problem? You keep it all in" would be a great one liner for a torturer in a book or film.

This thread made me listen to all their albums again.