Groove in heart

Gorillaz - Dirty Harry

...

I need a gun to keep myself from harm
The poor people are burning in the sun
But they ain't got a chance
They ain't got a chance
I need a gun
'Cos all I do is dance
'Cos all I do is dance
.
.
.
I need a gun to keep myself along...

I don't need a heart, just need a gun?
To keep myself from pain
To keep myself from sadness
Fill in the bullet, load into the shooter
Aim to my heart, synchronize rhythm
Five, Four, Three, Two, One...
Press the trigger, is time to over
It's really groove, isn't it, loser?