Never figured out what's up with this, but it's baffled me for a long time.

In my single days, if I commented on how attractive this or that gal was, if she was Black, the occasional person (always some person I knew) would mouth to me "she's Black."

Are there people out there who really believe others are totally unaware of skintone? Do they feel the need to educate some aspect of their social contract?

I've never figured it out.