One Of Life's Puzzles

Don't know why
T'wasn't thought of before
When I realized it
I was totally floored

I'm sure you must know
What I'm referring to
Not the meaning of life
Or why oceans are blue

Put your thinking cap on
I'll give you a clue
To do with some caramel
It's making me drool

It's made by Cadbury's
Called a Caramilk bar
I'm sure you've had one
The yummiest by far

Don't know their secret
Like magic methinks
Some spying if I try
Could land in the clink

Guess it's a puzzle
We'll take to our grave
Come back with the answer
Coz ghosts misbehave

They can spy on things
Without being seen
The secret will out
That'll be kinda keen

Then old Mother Earth
Will no longer ponder
We'll all catch our breath
At last, know the answer