People like self-portraits in the streets, it makes you participate in the scene blatantly as Velázquez and El Greco already did in their works "Las Meninas" and "The Burial of Count Orgaz" respectively, or how Alfred Hitchcock did in his films, without a word to anybody but realizing everything. You can also participate in the scene, be number one witness of what happens in your photography, self-portray yourself, like Velazquez in Las Meninas, with two balls