Exactly. When I wasn’t working (or it was under the table), my husband had to sign for any account, be it cell phone, new credit card, etc. Makes sense to me. I didn’t have an income (that the IRS knew about) but I had my own credit, credit cards, etc. from before I was married.
I signed all the checks/paid all our bills but I couldn’t change the accounts on anything or open new ones unless he signed also. It makes sense to me.