From the 2010 interview with Playboy:
PLAYBOY: Do black women throw themselves at you?
MAYER: I don’t think I open myself up to it. My dick is sort of like a white supremacist. I’ve got a Benetton heart and a fuckin’ David Duke cock. I’m going to start dating separately from my dick.
Unfortunately for Mayer, the “I’m not racist, but my dick is” route didn’t quite pan out for him.