Because I invented it....THAT'S why!
In the Kitchen-
Kid: Mum? Do you hear anything?
"Yuckster" Mum: No dear. Should I?
Kid: Yeah. I can't be sure but.....I think I hear someone singing 'Louie, Louie' from the cupboard. We haven't kidnapped any more midgets have we?
Mum: Look, that was just a phase Daddy was going through and he won't be released from prison for another sixteen years.
Kid: Well now I'm hearing 'She's gone Gongwipdu' by Deadbolt. That's it, I'm opening the sucker. (opens cupboard. Beholds Singing Sandwich)
Mum: Surprise! It's a Singing Sandwich!
Kid: Acid Flashbacks. Acid Flashbacks.
(From a scene that may be all too common this Christmas)
Just because you can invent it, it doesn't mean you have to