Do you always know where they are, and if not do they tell you? E.g would it bother you if they had stopped off to see friend/family on their way back from work and then came home and never mentioned it and you only found out when the friend/family member mentioned it to you in passing?
Yes I usually know where he is and yes he would normally tell me. It wouldn't bother me at all if he stopped off to see friends / family on the way home and he certainly wouldn't need my permission.
If the visit was planned he'd probably mention it before he set off. If it wasn't planned he would probably send a quick text so I'd know he would be late home. If he saw someone at lunchtime, he'd usually mention it in passing conversation when I saw him later.
Likewise I'd mention if I had plans in advance and text if I (for instance) decided to go for a drink after work (post-Lockdown).
Do you know what they spend their money on and how much they spend and do you ever ask if you see them with something new?
I wouldn't care or need to know how much he's spent on most things. Just like I don't tell him every time I buy something.
We live together so we see when the other gets deliveries - and no one is hiding anything so yes I know what he spends his money on as it all appears in our house.
But I wouldn't ask how much he's spent each time (although I do sometimes tease about how much he spends on his hobby and he knows I have an incurable hardback book habit).
If it's an enormous cost like a car I would expect us to discuss that as a family. And of course I know how much he spends on school fees (he has two daughters from a previous marriage), which is easily his biggest outgoing. I also know how much we as a family spend on rent / food / bills etc as these are shared costs.
So yes - I generally know what he spends his money on, I don't ask how much (but I could probably make an educated guess).
BUT we are relatively comfortable and each have our own cash. If we needed to budget more stringently (as many families do) then I'd expect more discussion around mid-price things potentially - for both him and me. We both earn, him slightly more than me but not by loads.
Do you have individual savings or shared?
We both save into ISAs separately, and pensions separately. But we are still saving for common goals. For instance we would like to buy a house and are both saving towards that. He know what I save and I know what he saves and how we're tracking towards the deposit we will need.
Do they share private information relating to their friends and family?
It would depend what it was and who it was, but generally yes. I think if someone had specifically asked him not to tell anyone then he would keep that confidence, but we're generally quite chatty about most things in life and don't really keep secrets.