Well, I suggest there's usually a difference between a "young buck" of any description and a "black buck."

I suppose we've all heard the claims that "the jig is up" refers to lynchings and that "niggardly" is racist. Both ideas are historically absurd, though the assertions have been around for so long now that many people believe them.

Yesterday there was this:

http://abcnews.go.com/Politics/OTUS/us-census-bureau-drops-negro-surveys/story?id=18591761

In my day (the time of the Civil Rights movement) "Negro" (as in "American Negro College Fund") was, along with "colored people" (as in "National Association for the Advancement of Colored People") as neutral as "African American" is today. "Black" was truly insulting - at least when used by whites.

"People of color" is now as neutral as "Negro" was formerly. But "colored people" is now offensive.

Go figure.