This example of the Dogon Seated Couple is from the Metropolitan Museum in New York. The page at the Timeline of Art History is very good, and so is the page from the "Search the Collection" site. The TOAH also has an essay on the subject of "Couples in Art" which might be interesting. And of course the textbook has a paragraph or so.
One advantage to visiting museums is that you can walk all around the figure and study it from other angles. Since I don't have a Magic School Bus, here's a video that slowly rotates around an example of a similar sculpture. You can ignore the music and descriptive words -- it's from a commercial gallery that sells Dogon art -- but the video is useful.
