I think anyone who doesn't know what the hook is should figure it out from the context. I don't see the need for an explanation.

On the other hand, if they have been living under a rock long enough to not get it, even the explanation may not be enough.

I couldn't understand a single word to this Blues Traveler song "Hook" until I looked up the lyrics but I always liked it. I like it better now.

http://www.youtube.com/watch?v=arUpcpRR568

Hook lyrics

It doesn't matter what I say
So long as I sing with inflection
That makes you feel that I'll convey
Some inner truth of vast reflection
But I've said nothing so far
And I can keep it up as long as it takes
And it don't matter who you are
If I'm doing my job, it's your resolve that breaks
Because the hook brings you back
I ain't tellin' you no lie
The hook brings you back
On that you can rely
There is something amiss
I am being insincere
In fact I don't mean any of this
Still my confession draws you near
To confuse the issue I refer
To familiar heroes from long ago
No matter how much Peter loved her
What made the Pan refuse to grow?
Was that the hook brings you back
I ain't telling you no lie
The hook brings you back
On that you can rely
Suck it in suck it in suck it in
If you're Rin Tin Tin or Anne Boleyn
Make a desperate move or else you'll win
And then begin
to see
What you're doing to me this MTV is not for free
It's so PC it's killing me
So desperately I sing to thee of love
Sure but also rage and hate and pain and fear of self
And I can't keep these feelings on the shelf
I tried, well no in fact I lied
Could be financial suicide but I've got too much pride inside
To hide or slide
I'll do as I'll decide and let it ride until I've died
And only then shall I abide this tide
Of catchy little tunes
Of hip three minute ditties
I wanna bust all your balloons
I wanna burn all of your cities to the ground
I've found I will not mess around
Unless I play then hey
I will go on all day hear what I say
I have a prayer to pray
That's really all this was
And when I'm feeling stuck and need a buck
I don't rely on luck because
The hook brings you back
I ain't tellin' you no lie
The hook...
On that you can rely

An ego under its own power travels assback. ~ Smarticus