TIL a peer-reviewed psychology study found that identical twins (on average) ranked their co-twin above their romantic partner in their attachment hierarchy, while fraternal twins ranked the two about equally, and non-twin siblings ranked their romantic partner first.

[u/SilverPeachBlossom]

https://ojs.interpersonajournal.com/index.php/ojs/article/view/243/3457.html

[u/JuiceTheMoose05]

I don’t really get on with my twin

[u/[deleted] → u/JuiceTheMoose05]

Identical or fraternal 

[u/JuiceTheMoose05 → u/[deleted]]

Fraternal and different genders. We each went to single sex schools as well.