"The Honesty Rap" is a song from The Amazing World of Gumball. In "The Sock," Mr. Small sings it to teach Gumball and Darwin when it is appropriate to tell the truth.
Lyrics
Mister Small: Ho-ho-ho-ho, honesty!
(imitates record scratching), honesty!
Break it down!
When you wanna be honest, just beware!
The truth hurts in this nitrogenic atmosphere!
You gotta wake up, realize and recognize
The time for truth, and strategical lies
But keep them lies of a manageable size,
Or tears will arise, and hurt their eyes!
So before you speak, it's best to remember:
[Spoken] Each individual case will require a specific judgement call, depending on who you are talking to, and the context of the conversation!