I guess as human beings, we love to lead a life having good stuffs for us, including luxurious items. It is not right to label all luxurious things as bad expense, as long as the product is not meant to only show-off to others, it is fine to buy expensive things provided one has amount to spend on other basic necessities in life and that product is useful and gives value for money. Sometimes I prefer to buy expensive clothes because they feel more comfy and also it feels good as it has a brand name and good-will.