A smart answer to the question:why you don't buy a gift for your friend's birthday?("The big bang theory TVshow")
“The entire institution of gift giving make no sense! Let’s say that I go out, and I spend 50 dollars on you, it’s a laborious activity because I have to imagine what you need, whereas you know hat you need. Now I could simplify things, just giving you the 50 dollars directly, and then you could give me 50 dollars on my birthday, and son on until one of us dies leaving the other one old and 50 dollars richer. And I ask you, is it worth it ?”