Lets be realistic, your girlfriend isn't a virgin.
But how do you react when you find out she's been with a black guy before you?
You'll never stop thinking about how her little pussy has been completely stretched out by a huge cock, a cock bigger than yours.
You reflect and think about the times you've had sex and wonder if she's been faking the joy. Does your little white cock compare to huge slippery mahogany cock? Do you leave her?
No matter what she says, your cock does NOT compare to the BBC she took. That bbc literally tore her pussy up.