How often do you spend money on things that you really don’t need? Quite often, right? This is a human desire that influences him to get those needless things that are of almost not useful to you or at least not much necessary.
If you will contemplate this, you will realize you expend hundreds or perhaps of dollars on such not so needful materials. And our world is full of futile items, but no matter whether you need these things or not, your desire just wants them.