Some people just don't get that angus aren't the only black cattle in the world. Sometimes when they see my signs, they'll comment that they thought those would have been angus cattle so I explain to them that they're black simmentals. Except one year, there was this guy who just couldn't believe my heifers weren't angus (even though one of them had a white face). He kept saying, "How do you know their simmentals?! They look like anguses to me! They're black!" He finally left, but he wasn't happy about it.
Then there's the hard core city slickers that think that all cows are black and white spotted like a holstein and get confused when they see a red cow.
I had a professor who told me an odd one. She said there were these 2 old women who drove past her old university's dairy farm and stopped by and asked how often the students moved those "card board cows" around.. The cows were real live cows.
I also knew this girl who thought that the energy drank called "Red Bull" was made from bull semen because the semen gave people energy. (lol)
And you can't forget the city people who walk through the barns at the fair and hold their nose!