[Bryan:]
All they know
Is when we fight
They never see us in the loving times
What do they know
They don't know
A thing
[Mark:]
And they don't know
How laughter flies
Only the stories
Most of which are lies
What do they know
They don't know
A thing
[Shane:]
How can you understand
A love so strong
When you never shared that with someone
And when all the lies are dead and gone
We'll still be here
We'll prove them wrong
[Mark:]
Cause they don't feel
Your touch at night
The way your head falls in the morning light
What do they know
They don't know
A thing
[Bryan:]
How can you understand
A love so strong
When you never shared that with someone
And when all the lies are dead and gone
We'll still be here
We'll prove them wrong
[Shane:]
Cause all they know is how to criticize
They'll never take a chance in their own lives
What do they know
They dont know
A thing
And all I know
Is they don't know a thing
Send "What Do They Know?" Ringtone to your Cell 
All they know
Is when we fight
They never see us in the loving times
What do they know
They don't know
A thing
[Mark:]
And they don't know
How laughter flies
Only the stories
Most of which are lies
What do they know
They don't know
A thing
[Shane:]
How can you understand
A love so strong
When you never shared that with someone
And when all the lies are dead and gone
We'll still be here
We'll prove them wrong
[Mark:]
Cause they don't feel
Your touch at night
The way your head falls in the morning light
What do they know
They don't know
A thing
[Bryan:]
How can you understand
A love so strong
When you never shared that with someone
And when all the lies are dead and gone
We'll still be here
We'll prove them wrong
[Shane:]
Cause all they know is how to criticize
They'll never take a chance in their own lives
What do they know
They dont know
A thing
And all I know
Is they don't know a thing
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