Most identical twins agree that theyve never fallen for the same person, whether or not they end up marrying other identical twins. Segal finds this puzzling. I suspect that twins often really are attracted to the same person, but once one twin partners up, the other backs off, she says.

Can cousins be in love?

Although some communities do allow marriages between cousins, it is difficult for most to imagine a romantic relationship between first cousins as they are considered siblings. “A relationship like that is just infatuation and does not usually have a definite end, unless the family is open enough to accept it.