Cording is the act of establishing a cord of connection with another person that draws energy from him.

Cording is designed primarily for parents to be connected with their children as if through an invisible umbilical cord. Cords allow parents to provide supplemental life support for their children until they can become energetically independent (during adolescence). They also allow parents to be aware of what is happening with their children.

Please read the article about cording at this site. http://www.michaelteachings.com/cording.html

Essence twins are not necessarily corded in the way we are speaking of here. They share a permanent connection on an essence level. Cording is on the physical level.