There was this lab rabbit that escaped from the lab and met up with some wild rabbits, which he had never seen before. He asked the wild rabbits what they did all day. The rabbits said that they went over to the field and ate as much lettuce as they wanted.
The lab rabbit went to the field and ate a whole bunch of lettuce, then went back to the others.
He asked them what else they did.
They told him that they went to another field and ate as many carrots as they could.
The lab rabbit went to the other field and ate as many carrots as he could. He enjoyed the food very much, as he never had any at the lab.
When he got back to the rabbits, he surprised them by announcing that though he enjoyed nature's bounty, he would be returning to the lab.
Surprised at this, the wild rabbits said to him, "you just escaped from the lab, don't you want to stay here with us?"
The lab rabbit replied, "I sure like it outside the lab, but after such a satisfying meal, I need a cigarette like you wouldn't believe!"

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The selfish, they're all standing in line
Faithing and hoping to buy themselves time
Me, I figure as each breath goes by
I only own my mind