GF:"where'd you go last night?"
BF:"i went to the movies with some friends."
GF:"your lying to me!" (cries)

Oh my god have you heard that new Dula Peep song?

lying is good for dealing with authority figures.

For example:

boss: Joe! Did you get that report finished?

Joe: Yes, I'll have it on your desk by lunch.

where Joe hasn't got the report finished.

Mike: That Gonzo... he's always lying!

Mom: Did you clean your room
Son: Yes i did, and it looks beautiful, as do you, can i have some dinner now

(while lying to his mom
In reality, all the son did was clean the visible part of the room that his mom could see, and quickly changed the topic)

Woman: You are the most handsome man I ever knew.
Man: ...

Woman: Where were you?
Man: With friends, as usual.
Woman: You are lying.

Want to see somebody that mastered the art of lying? Just see our current president.