True 50/50 in a relationship?

Anyone have succeeded having a true 50/50 in a relationship? I keep reading about this on this site.
both before having kids and after having kids.
some may know I was a career woman before I got married and had kids. Then a stay at home mom after my 2 kids were born.

now I am the bread winner and my hubby is a stay at home dad.
We have yet make any calculations with 50/50. I would not know how that works financially? And how else? Like you must sleep on 50% your side of the bed and don’t cross over?

True 50/50 in a relationship?
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