How to tell Jokes without Offending Anyone?

Having a sense of humour is a very important form of social skill. People with good humour tend to be more likeable and popular. Comedians draw attention to themselves by telling jokes. But often than not, if a joke isn't well presented it would offend someone and the end result isn't good.

When not to cross the line?

No matter how sensitive an issue is, it's okay to be made a joke and for a laugh. No matter how offensive or bizarre it may be, it's still okay to be spolen. But when does it goes wrong?

The expression, presentation skills and the way of words are the major important factors.