Small cravings

I feel it is common among we, the humans to crave for something or the other. It is normal for one to do so. It is common to say - I wish, I were like that, I had this, etc. Sometimes we crave so much for certain things though we know we can't obtain them. I am sure all of you would have craved for somethings in life. Or you may be craving even today for some or the other thing. You must have dreamt a lot about it. But not always do our dreams come true. You are sometimes sure, that you can't obtain it. Still, you are reluctant to give up your hopes!!