It seems pretty clear that you either don't live in the U.S., or you are completely ignorant of the cost discrepancies that exist in the U.S. between being male, or female.
It is expensive to be female in this county, Stigbob, and I'm not referring to a Diva or Princess - just a normal woman. As a simple example, her basic haircut probably costs 3 times what yours does. That's not styling (yes, they might have to pay for that, men generally do not), or coloring, just the cut. Women here get unfairly gouged on their products and services, those that are needed, and those that are just wanted.
As a male, if you have a woman in your life, she costs money that you would otherwise not likely be spending, and that will hit your bank account, one way or the other. Those costs add up, and quickly. You can continue to look at it through the narrow microscope of just shared living expenses, if you like, but that would be foolish.
This is not to bash women, by the way - they are pretty awesome, actually. It's just the simple fact of the matter, and it doesn't matter if your money is completely separate. Those extra expenses still hit your bottom line too.
Get on with the merge, Frontier, so we can move forward on a unified platform.
Riôt
Living expenses cost a heck of a lot more than even Mrs Stigbobs hairdresser. We both earn so I base it on that. I have had partners who simply expected me to finance everything but thats no basis for a relationship and I binned them.
I also have hair clippers, which reduce my hair costs.