So a couple needed to save another $500 for an e-ring.
They say she needs to save over $500 at the next shopping trip. So they go shopping and buy 50 lotions, 25 toothpastes and who knows how much other shit. This is on top of all the stuff they already have at home. Of course, she did save over $500.
Now no one needs 50 lotions. So if she just didn't go shopping she would have saved the same $500? No? Too logical?
What differentiates an average host and a great host is anticipating unexpressed needs and wants of their guests. Just because the want/need is not expressed, doesn't mean it wouldn't be appreciated.