She also looks fat and unattractive.
No, fwb doesn't have you paying for shit.
Marriage is 'sophisticated prostitution'. You aren't given a concrete price up front (so the expenditure is nebulous and extravagant), there may be children involved and if she leaves you must continue to pay her 'fees' despite not even receiving any services.
Its best to look at marriage as a lopsided legal contract between three companies. You, her and the state. The man and the woman merge to make a corporation and she and the state (who is the arbiter for whatever reason) are the sole beneficiaries. And unlike normal companies that may disband and go their separate ways, she can continue to draw from the man's earnings despite the contract being voided. It is a profoundly stupid deal for any man to take.