My parents married in 1969.
From day one everything was in joint names. The only exception since has been ISAs where you can't, and they don't like that.
Dad has always been the higher earner. Mum was SAHM while we were young, a teacher before and after.
This always seemed a good model to me. All financial decisions were completely shared, but then they were both sensible with money.
In my own marriage, things were much the same (I'd grown up to believe this was how it should be) and most was in joint accounts. However, DH had no interest in our finances. I managed everything, so although in theory he had free access to everything, he basically just asked me what we could afford.
I'm now widowed several years, in a comfortable financial position with a new partner.
Recently Dad has been in hospital. He's only met DP a couple of times previously, but he's been coming with me to visit, which Dad appreciates. They've chatted a lot and for some unknown reason Dad has explained how their finances are organised. He's usually very private about money.
Anyway, I am by far the better off partner in the new relationship and our finances are entirely seperate. I might occasionally treat him to a coffee, but generally we pay everything 50/50. This feels right to me and he hasnt queried it.
It occurs to me that "we" like shared finances when women benefit, but not so much when i'ts in favour of the men....