A virtual business transaction is implemented between a first virtual world and a second virtual world by providing a searchable catalog that includes one or more items each comprising a virtual good, a virtual service, a real good, or a real service. The appendage ring serves as a point of attachment for a push bar, trailer, tool, vehicle chassis, or other device. A caller confirmation section searches a telephone number of the telephone directory information registration section 109 based on the telephone number acquired by the telephone number acquisition section and confirms the caller. At least one expandable member is arranged to be expanded to control the passage of food andor to mimic the churning action of a patient’s stomach.