Conjoined twins, rare variants of monozygotic twins, result from an incomplete division of the embryonic disk after the 13th day of conception. It is believed that conjoined twins are often able to see out of each other’s eyes and read each other’s thoughts. In many cases, there is no clear distinction where one person/body ends and the other begins. How can those who define their identity based on the boundaries of their own skin begin to comprehend this phenomenon? In the performance A common chorion, we explore the consequences and outcomes of movement in a conjoined body.