Drawing a comparison in order to show a similarity in some respect.
The operation of a computer presents and interesting analogy to the working of the brain.
Selfish - concerned chiefly or only with yourself and your advantage to the exclusion of others; "How selfish you are".
Nice - pleasant or pleasing or agreeable in nature or appearance; "That`s a nice thing".
Money - the most common medium of exchange; functions as legal tender; "Get money having asked".
They - Used to refer two or more people or things; "They were my in laws".