Sachs said: "Non-image dance has a certain degree of out-and-out sexual color, showing a lot of sexual movements in temperament and posture;" But it is different from' image dance', and its basic theme does not show the cohabitation relationship between the two sexes. People can't classify the dance that shows lust as the first action and the action that shows sexual intercourse as the second action, as originally formulated. Because the boundary between the two is often difficult to determine. Bringing sexual intercourse into dance is artistically handled. "