Our America with Lisa Ling

One in 90 births results in twins, and Lisa Ling wants to see what makes these pairs different from the rest of the singletons.

In this exclusive clip from Sunday's Our America with Lisa Ling episode, "Twin Lives" (10/9c, OWN), we meet 23-year-old twins Chelsea and Bailey. Their incredibly close bond has been nurtured since birth, and they see no reason to start living separate lives as they grow older.

Check out the sneak peek:

We see where this is going, right? Double wedding! Two of everything! Also, consider that identical twins have identical DNA. Therefore, with two sets of identical twins marrying each other, any kids they have will be "genetic siblings" to their cousins.

The "Twin Lives" episode of Our America airs Sunday at 10/9c on OWN.

Do you think identical twins and their bond make them different from people born singly? Do you know twins who have a special bond?