Now, it's time for Words and Their Stories from VOA Learning English!On this program, we explore the meaningand usage of everyday expressions in American English.Today, we will talk about two parts of your head:the tongue and cheek.When you put them together, you get something funny!A tongue-in-cheek comment or observation begins seriously but ends humorously.However, behind the playfulness is truth.So, tongue-in-cheek comments often get people thinking.Tongue-in-cheek comments are often used in critiques.They tell something truthful, but in a light-hearted, funny way.You can sometimes get away with a lot by using tongue-in-cheek humorbecause the truth in it can sometimes be hard to recognize.The American writer Mark Twain was an expert at making tongue-in-cheek comments.Another famous humorist was Will Rogers.He was born in 1879 in what is now Oklahoma.He was part Cherokee and was known as "the cowboy philosopher."Rogers' warm humor made him one of the best-loved performers of his generation.During his long career, Rogers did a little of everything.He was an actor, both in the theater and in movies.He had a weekly radio show and also wrote stories for a newspaper.This tongue-in-cheek comment from Rogers is as meaningful todayas it was when he said many years ago:"Everything is changing in America.People are taking the comedians seriously and the politicians as a joke."Now, we all know that no one can know everything.But that fact doesn't sound very interesting, funny or witty.Will Rogers stated that truth in his typical tongue-in-cheek waywhen he said, "Everybody is ignorant only on different subjects."But how did putting your tongue in your cheekcome to mean a kind of twisted, oftentimes truthful, humor?Some websites say this expression dates back to the 18th-century England.One site says that it first meant a common facial expressionused to express dislike or contempt.These days, the contempt is gone and in its place are terms like irony.An irony is when you say the opposite of what you mean, usually to be funny.Another website says that people may have stuck their tongue in their cheekto keep from smiling or laughing.However, when it comes right down to it,you should not take a tongue-in-cheek comment at face value.It starts to mean one thing but then ends by meaning something completely different.That is what makes it so funny.Tongue-in-cheek humor is often successfulwhen it includes the speaker in a funny critique or situation.In 1962, President John F. Kennedy famously did thisat a dinner celebrating 49 American Nobel Prize winners.He said: "I think this is the most extraordinary collection of talent, of human knowledge,that has ever been gathered together at the White House ...with the possible exception of when (former President) Thomas Jefferson dined alone."In this way, tongue-in-cheek humor can be self-deprecating.It is effective when you want to make fun of yourself a bit.And this brings us to music.For some reason, country & western musichas a long history of producing tongue-in-cheek songs.With titles like "She Thinks My Tractor's Sexy,'""Queen of My Double Wide Trailer" and "Bubba Shot the Jukebox,"it is clearly a type of music that does not mindpoking fun at its own culture and lifestyle.In the 1970s, Mac Davis became one of the biggest names in country music.He wrote songs for Elvis.And because he was so handsome also got into acting.Then in 1974, he had everyone laughingwith his tongue-in-cheek song making fun of his own life."It's Hard to Be Humble" became an instant hit."Oh Lord it's hard to be humble When you're perfect in every wayI can't wait to look in the mirror Cause I get better looking each dayTo know me is to love meI must be a hell of a man Oh Lord It's hard to be humble,But I'm doing the best that I can!"And that's Words and Their Stories.Out of all the programs here at Voice of America,this is one of them.