Since we moved in together, me and my partner have a joint account to pay the rent, bills, and food. We put a set about in every month, and have our own separate accounts to buy things for ourselves, including meals out, treats, clothes etc etc.
We budget about £40 a week for food. I checked our bank statement today and saw he spent £25 on the joint account in Asda a few days ago, but I don't remember him bringing any food back. I've confronted him and he said he spent it on fizzy drinks, cakes, and paid for his mum's shopping?! 
I'm fuming! If I was going to buy any of these things I would put it on MY card, not the joint account. I don't see why I should pay for these things, or his mum's shopping??
I've used the joint account here and there for household items when he's not been there, only about £3-4, and he's questioned me about this so I'm really annoyed about it.
He doesn't see the issue. ugh 