There's a reason that you're in my head
And there's a good reason why you're in my bed
But there's a reason that a you're my girl
And there's a reason that a you rock my world, you rock my world, you rock my worrrrrld

Cus you're dirty
But you got a good heart
D-D-D-Dirty
But you're not a cheap tart
Yeah Yeah Dirty
But you got a good heart
D-D-D-Dirty (Yeah)
But you're not a cheap tart

There's a reason why you're in my head
There's a very good reason why you're in my bed
There's a reason that a you're my girl
There's a reason why you rock my world

Cus you're dirty
But you got a good heart
D-D-D-Dirty
But you're not a cheap tart

(Guitar plays)

There's a reason why you're in my head
There's a good reason why you're in my bed
There's a reason that a you're my girl
There's a reason that a you rock my world, you rock my world, you rock my worrrrrrld

Cus you're dirty
But you got a good heart
D-D-D-Dirty
But you're not a cheap tart
Yeah Yeah dirty
But you got a Big heart
D-D-D-Dirty
But you're not a cheap tart

(Guitar plays)

(Thanks to Esther for these lyrics)