Black men probably do have bigger cocks...
I'm a versatile "bi" man and have been intimate with many men of all races. Black men probably do have bigger cocks on the average, but most of them I've known prefer sex with a give-and-take partner who enjoys fucking them too. They often feel short-changed, because white men often focus on their cocks, neglecting their desire for anal sex at the receiving end. Thus a mate like myself enjoys a great advantage. I don't neglect a black man's cock, but I don't dwell on it to the exclusion of all else. I think that's the proper balance: Let's roll dice or flip a coin, letting the fates decide if it will "your ass or mine" tonight.