Selective mutism is a curious psychological disorder where children refuse to speak, or refuse to speak in certain situations (like school), despite having no speech problems.
The first verse of ‘Child Psychology’ describes the experience from the child’s perspective:
I stopped talking when I was six years old
I didn’t want anything more to do with the outside world
I was happy being quiet
But of course they wouldn’t leave me alone
My parents tried every trick in the book
From speech therapists to child psychologists
They even tried bribery
I could have anything, as long as I said it out loud
I’ve never been able to find out whether the singer is describing a real experience or it’s just poetic license for the sake of the song.
Rather ironically for a song about selective mutism, the song was banned from radio and MTV because of the chorus which goes “Life is unfair, kill yourself of get over it”.
UPDATE: Thanks to Kate for posting in the comments that the lyrics to “She’s Given Up Talking” by Paul McCartney also describe the condition. If you know of any other songs, do add them in the comments.