OMG - this joke is too much

A white woman and a black man are dancing at a club, and after a while things start to get hot and heavy. After some heavy kissing and petting, the woman makes the suggestion that they return to her apartment for the night. When the couple arrives at the woman’s apartment, they begin passionately kissing and undressing each other, preparing to have frenzied and unrepentant sex with each other. However, the white woman, curious as she was, asked the black guy as he was taking off his pants, “before you take them off….is it true what they say about black guys?” With a suave yet sinister look, he looked into her eyes and said “baby, of course.” He then proceeded to stab her and ran out with her purse.