When you shop for a family there are all sorts of things around that you wouldn't buy / make for yourself but might, just ocasionally, fancy if they are around.
So now it's just me (and the cat) I don't buy bananas or teacakes, hardly ever make custard (packets of powdered milk well past their BB date), and flapjack. So I have bags of oats to use up too, and porridge was another 'make enough for two, then', though I do sometimes have it for supper - not often.
So what foods wouldn't you buy regularly?