You see, the native in question may become irate because a photo is like taking their soul, and will require many ritual cleansings and expensive animal sacrifices. (Cue The Rev Al. Image of Native? Bad Ju-Ju, or in this case, MoJo).
Experienced travelers in primitive lands always ask permission, and may even offer some token of recompense to the potentially offended native.
please check here before photographing natives:
www.foxnews.com/.../travel-sites-where-photography...