Metaphor Example

On House, Dr. Gregory House uses metaphors as a means to help people understand complex conditions or situations. As he explains, 

"Have you guys heard any of my metaphors yet? Well come on, sit on grandpa's lap as I tell you how infections are criminals; immune system's the police. Seriously, Grumpy, get up here: it'll make us both happy." (Episode: Mirror, Mirror)

Another example:

Dr. House: As far as you're concerned, the patient is Osama bin Laden, and everyone not in this room is Delta Force. Any questions?
Applicant #11: We're protecting Osama bin Laden?
Dr. House: It's a metaphor. Get used to it.

(Episode: The Right Stuff)