According to the Attachment Theory (especially the evolved one adding many sub-types from its first apparition) which I adore thanks to its power in explaining human behavior and our daily interactions, opposites IN INSECURITY attract each other, indded for a very simple reason! We are attracted to the unhealthy bond we are familiar with, the one we built with our parents and that we consused with genuine love. The attachment style we form is quite the opposite of our main caregiver since we needed to adapt to theirs in a desperate atempt to get some love. For instance, if the caregiver is emotionally unavailaable, we may tend to cope by becoming a pleaser or rescuer. The opposition explains why insecure folks are never fulfilled in relationships since their subconscious needs and from the relationships are quite opposite!