Gossip is like a fudge brownie with chocolate chips. Most people KNOW they shouldn't indulge, but many still do.
Motivations can vary. I know someone who is simply malicious, and spreads tales of her enemy with malicious intent.
I also know someone who is just fascinated by all the goings on of other people, and likes to repeat them to me. I try very hard to ensure that my vine in the grapevine grows no further.
@Umile Respect to you, as well. Maliciousness is just the tiny bud of jealousy and evil that people allow to grow inside themselves...without the self examination necessary to realize that not ALL of their emotions and actions are healthy or GOOD.