Also, wow Guess Who? is an artifact. Roughly 30 people designed to be very different in appearance and yet everybody is white. And I never even saw that until now.
The same sort of thing applies to homosexuality. When someone is comfortable using the term and is willing to refer to people as gay or straight (or bi, or queer, or whatever label they like) people naturally assume they are less biased than someone who wiggles about trying to say "those people" or other such wishywashyness. Gay rights and acceptance requires that people be comfortable talking about it and accepting that is it normal. Being cognizant of the standard labels and using them easily is a small but necessary first step.
This is true regardless of your minority group type or name. Poly, trans, gay, black, female, mentally challenged, or any other group that has specific difficulties being accepted all start the path towards acceptance by getting everyone to understand the terms and use them. The trick is that we don't get anywhere by simply pretending there isn't a problem and refusing to acknowledge what is in front of our eyes. We all know we can see racial differences and that we are not colourblind even when we try to be. We cannot solve racial issues by deciding to ignore race and burying our collective heads in the sand doesn't work for any other marginalized group either.
It all begins with saying "This is a group of people. These are the labels they use. This is what those labels mean. This is how we use those labels." There is much to do after that certainly but this is where it has to start.