Since numerous twin pairs have been emotionally reliant on one another for many years, they unwittingly develop an unhealthy dependence upon one another. Very few people question this codependency because twins are expected to experience an extraordinary closeness.

Why are twins so close?

Identical twins share a particularly intense bond. They are the result of one fertilized egg splitting into two, giving them identical DNA. As a result, identical twins are as close as two people can be. They can speak in unison (its weird at first, then charming).