When a spouse comes from a monied family that perhaps had someone come in a clean a couple of times per week, went on wonderful vacations a couple times per year, had what ever shoes they wanted plus what ever clothes were in fashion, etc....then it's hard when that spouse marries a person who perhaps grew up poor.
The house would be more "lived in" look, less spotlessness, resale shops and thrift stores for new clothes, hand me downs from siblings to younger siblings, Hamburger Helper 3-5 times per week with the cheap hamburger meat, Tuna Helper at least once per week, and pinching every penny to see if there's another behind it.
This couple is going in to a marriage with such different ideals about what a family is like and what they do with their money and their traditions.
They will argue over money because one spouse will want to have security and know they won't go without food and will be able to pay all the bills each month, have a good size cushion.
The other spouse is going to want to plan those vacations and see the world with their family alongside them. They'll want to have a nice home that has an elegant style while the other one is going to want to spend less and is probably not going to understand why the other spouse would want to give away that much money for 4 walls and a few things inside...
So you can see that this could be a totally impossible situation.
In these times we do have a lot more ability to see how the other half lives and find ways to compromise on things. They should find ways to address some of these issues before they set the date though.
Sitting down and listing some things they want over the years, such as how many children, what about one staying home with the kids, if both have always dreamed of working in a career and planned for their education to be that person it may be hard to stay at home. I hate staying at home. My house is cleaner and life is so much easier when we both work. I can't stand not working in my chosen career.
If the spouses both went to all that trouble to go to college and study a topic They should be able to work if they want to. If the one spouse who feels there should be someone home with the kids and the other is adamant they want to also work then they have to come to a compromise.
Almost all of my friends don't want their kids to work during high school. They want them to go to church, go to school, make good grades, have some fun, and be mature enough to handle going off to college and not end up an alcoholic and pregnant or something.
All in all they have a lot to discuss and it's good if they write it down so they can look back and see if they still feel like this a few weeks later.
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My husband grew up with a dad that was career Navy. So my hubby lived in California, Bermuda, Kansas City and Salt Lake City while dad was in Antarctica, Washington DC, and more.
His mom always worked so she'd have something to do with her time. My hubby basically raised himself, doing his own laundry, fixing his own meals, putting himself to bed, cleaning up after himself, etc....
I grew up on the south side of OKC and went to public school. My mom stayed home and dad worked a menial job. He made enough to support us but we didn't have vacations and new stuff all the time.
So we've had issues. He's pretty much come down to my level. It's hard on him to not live like he did as a child, rather like a nomad. He misses traveling and other extra things like that. But we are still together after 20 years.