First you say, "with out thinking" then you say, "a question to make one think", so I am confused. However I will attempt to answer anyway, and I did not put very much thought into it as whenever this question comes up I immediately am reminded of a quote from one of my favorite books, 'The Sirens of Titan' by Kurt Vonnegut, which is as follows:
"Once upon a time on Tralfamadore there were creatures who weren’t anything like machines. They weren’t dependable. They weren’t efficient. They weren’t predictable. They weren’t durable. And these poor creatures were obsessed by the idea that everything that existed had to have a purpose and that some purposes were higher than others.
These creatures spent most of their time trying to find out what their purpose was. And every time they found out what seemed to be a purpose of themselves, the purpose seemed so low that the creatures were filled with disgust and shame.
And, rather than serve such a low purpose, the creatures would make a machine to serve it. This left the creatures free to serve higher purposes. But whenever they found a higher purpose, the purpose still wasn’t high enough.
So machines were made to serve higher purposes, too.
And the machines did everything so expertly that they were finally given the job of finding out what the highest purpose of the creatures could be.
The machines reported in all honesty that the creatures couldn’t really be said to have any purpose at all.
The creatures thereupon began slaying each other, because they hated purposeless things above all else. And they discovered that they weren’t even very good at slaying. So they turned that job over to the machines, too. And the machines finished up the job in less time than it takes to say, “Tralfamadore”."