In editing, there's something called the "Kuleshov Effect", where people will read an image differently if another image precedes it. Similar kind of thing: https://en.wikipedia.org/wiki/Kuleshov_effect
Though I think things are more overt now. They just flat out have a black man/white woman couple in every advert, and make the white guys look like effeminate wimps.
Though I think things are more overt now. They just flat out have a black man/white woman couple in every advert, and make the white guys look like effeminate wimps.