It's taboo, but I think he described a fantasy that's very common,(for both black and white men and women in a mixture of roles), but just isn't a openly spoken about for obvious reasons. As long as it doesn't become his reality or true opinion of himself, I think it's harmless and he shouldn't be judged for it. Not sure I believe him when he says no one has agreed to it with him though - if that's his fantasy and he's prepared to speak about it on radio, I don't doubt he's played it out for real.