It is the fragrant lack of practicality that makes high-heeled shoes so fascinating: in terms of static mechanics they induce a sort of insecurity which some find titillating. If a woman wears a high-heeled shoe it changes the apparent musculature of the leg so that you get an effect of twanging sinew, of tension needing to be released. Her bottom sticks out like an offering. At the same time, the lofty perch is an expression of vulnerability, she is effectively hobbled and unable to escape. There is something arousing about this declaration that she is prepared to sacrifice function for form.