Explanation: Inchworm: insect names, two three-inch in length, flexion and extension while the line. Geometrid obtained by bending to stretch. Analogy to retreat strategy. Source: "Book of copulative down" The flexor geometrid order to the letter (extension) also. " Examples: Geometrid desire stretch from the bend to be dirty. (Ming Wang Shizhen "Ming Fung Kee" V out)