The appeal of horn shapes is not difficult to understand in the field. One quickly learns to appreciate the variety of trained and untrained shapes in a forest of horns in the cattle camp. Both the symmetrical and the asymmetrical curving shapes of Nilotic cattle horns have great visual appeal, especially when they are seen moving through space as the cattle move their heads, and when the arcs the horns make in the air are exaggerated by the swinging movements of the tassels. Fagg (. 1973) has drawn attention to the frequent use of exponential curves in African art:.
