Re:
From a "legal" perspective, if you are marrying, assets become property of the marriage anyways. Not conjoining assets while being married has more drawbacks than joining them. Truly, if you are concerned about joining a bank account, then there's bigger fish to fry, because she will have access to also destroy your credit, which is more damaging than blowing cash that you can electronically move.
1) If you don't conjoin accounts, then if you're unconscious, disabled, or not of a mental state in which to conduct business or personal financial affairs, without a Durable Power of Attorney, nobody can. From there, if you don't recover fast enough or need money in pinch, no one, not even your wife to whom you made various pledges CAN gain access to that money. So, through your mistrust and perhaps inability to find a suitable mate, you screw yourself.
2) Should you get a Durable Power of Attorney, which you need once you're married anyways, she has FULL control and access to do WHATEVER she wants. She's in effect a complete COPY with the full rights and priviledges that you possess. She can enter agreements, take out loans, buy cars, or even sell your home right out from under you.
Don't believe me?
I just finished a basic Legal package for an uncle who came down with colon cancer and feared for this survival post-op. He had no wife to put down as his durable power of attorney, beneficiary, and healthcare proxy, so he put my aunt (his sister) down. My aunt will have copies of The Will and Healthcare proxy BUT NOT the DPoA. Why?
Because even as his sister, she can do whatever she wants, whenever she wants, however she wants. Most courts won't recognize any DPoA that doesn't embrace such an attitude of complete power.
There's really no option. If you opt to be married and own property in the US, unless you choose to become SO widely voiced in all aspects of law, you must choose their system or become a victim and suffer the consequences.
Sure, you can be a hippy, and try to be a non-conformist, but good luck owning property, disposing of that property, and controlling that property/wealth without knowing and adhereing to the laws. Your other option is to move to another country.
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Guys, drop the act. The solution here is to become a BETTER man who can handle such problems. I know LOADS of guys who were divorced. Know what?
Three of the ones I know, at least, went on to make more, do more, and become more. They didn't let the fact they "took a shot" beat them down. They didn't bemoan circumstances, because like life, women can and will change, though we hope they won't. They went with the flow, acted, and planned.
You can say IF YOU MARRY, DONT GET JOINT accounts, but it's truly foolish. Why in the heck are you marrying this woman?
Redefine your definition of marriage and love and committment and relationships. It's funny, because Tucker Max has a post on his forums mentioning that if you're under 27, or 25, just shut up and live. Don't make assumptions or pretend to know it all. I'd wager many of the guys worrying here are at that age break and younger, and you're only making more problems than good.
It's ignorant to suggest NO combination of bank accounts, for instance. IF YOU MARRY, as the laws state across most if not all of the states, you are also seceding your laws. At least under the law, TWO BECOME ONE, even if it's mushy crap.
FIND BETTER WOMEN.
BE A BETTER MAN.
Don't bemoan the environment we are in when it calls for better man. A man won't RUN from his duties. A man rises and challenges them and challenges them until he wins.
This is also why you marry ONE woman. Not ALL women. If you're a better guy, and focus on that ONE woman that would make you committ to such a marriage, you're likely to find her, or least improve so much that you have a whole **** ton of women to choose from. Morever, you'll be a more pleasant person.
If you're this BITTER guy who bemoans who women have eroded over time into vapid bags of jizz, then you're just a guy with baggage who may never have a chance to get to know any woman in his life, or turns away the great ones by your oh-so-magnetic personality. Women can flip the switch and say how men have become more WOMENLY (metro, gay, weak, afraid, etc), and they wouldn't be wrong. Just look at half these boards in which they require approval from other members BEFORE they act and confirmation of opinions and agreements in many regards of what they do.
LIVE.LOVE.FAIL.SUCCEED.BREATHE.FEEL.
There's the legal aspect that porks you anyways, just by the virtue that your crap comes together anyways. And there's the philosophical aspect where you shouldn't be marrying a woman with whom you can't conjoin accounts, when there's far worse financial mistakes she could make.