i think i can make a conclusion,
we r happy when we buy things,spend your money to get what you want, it is a satisfaction...deeply indescribably feeling of ownership...
In spite of that,
when its come down to the road, u do your math on ur total spending..
suddenly it trigger your sense, "owh God.., what am i doing..."
~haha stupid..but yet, u have to agree, life works that way... ^^