Cultural stereotypes are often defined by skin tone and geography. People seem to have a fixed idea of what an individual from a certain region should look or sound like. Having your very existence contradict these fixed ideas that people have can be quite entertaining, so long as you're light hearted towards racial ignorance. Sometimes the best we can do with a tough situation is to make me laugh, and through happiness, they may be more open to learning a little more about a culture they don't understand.