My wife is completely OK with my spending but does get questions from some of the women she's worked worth; now keep in mind we live in Vegas, she says "he's not hanging in bars pouring money into bar top poker machines or doing the same at strip clubs" She has also commented "no way is he going to give some woman his tire money"
I make the comment that I hit the wife lotto; when I raced bikes, we camped but she would marinate some steaks, made up trays of veggies and taters. She's horribly sqeued when we shopped for the new/current house she insisted on a 3 car garage. While I'm sitting here typing this she shows me an ad for a mobile work bench at Costco.
Like a lot of you we split the bills. I make no secret about being the ADD poster child so she's good to bounce ideas off of, if I see some gotta have and start thinking she might actually react negatively (she hasn't yet) that pretty much lets me know,it's a stupid idea. We are also both cheap.
As someone else mentioned it helps that I have tools to fix things and do maintenance on her cars plus I'm able to teach our son to work on stuff. That helps a lot. I'm also a suck up; when I go into my local bike shop my long time friend always tells people that I have a beautiful wife and then says "Tom how'd you land such beautiful wife?" I rub my fist on the end of my nose "brown noser". When our son was little I would only race the Saturday of our double regionals, on Sunday I'd load the boy up in the car and we'd go hang out at the track so she could have a full day to sleep in, garden or whatever lease she wanted to do.
The down side is sometimes she's an enabler; I joked about buying a new dual sport bike, I'd gotten a huge pay increase via a promotion and she said "well you have the money" 3 weeks later I had a new Beta 520, first new bike I've bought in 25 years.
We had a rough patch financially about 17 years ago, got caught out when my job unravelled, right when we were cash poor. I quickly sold off my Volvo rally car for $4500, she was actually bummed because she new I loved the car. To this day she has total disdain for the arse-hat of a VP who turned the company upside down. I told yes I loved the car but it's just stuff.
I think the only car that she has ever even come close to having issue with was the D-Sports Racer; she could tell it made me miserable to own and despite it being a black hole of cash she never said a word till after I'd come home and announced "that car is going" even after that her only comment was that while she wasn't thrilled about the money she was happy I was selling it because I was routinely coming home from the track unhappy whereas I used to be on cloud nine with all the other cars.
So my recommendation for newly married guy would be; keep a separate car fun account, keep track of every penny, don't hide the spending and do something nice for them.
Finally I have to confess that I'm a kept man, while I make good money she makes 20% more than I do.
Tom