Yes, unfortunately these pictures are staged. The original source is a Japanese Porn company who decided to make a series of videos featuring their actresses having sex with various tribes in Africa, Papa New Guinea etc. They were actually for charity. Where all profits from the vids went back to the villages.
Article about it here:
http://www.sankakucomplex.com/2008/0...rican-orphans/
Download one of the videos here:
http://rapidshare.com/files/24295962...hJapAfrica.wmv