There are some studies, such as twin and adoption studies, suggesting genetics plays a role: https://pmc.ncbi.nlm.nih.gov/articles/PMC4038932/ https://pmc.ncbi.

There are some studies, such as twin and adoption studies, suggesting genetics plays a role: https://pmc.ncbi.nlm.nih.gov/articles/PMC4038932/ https://pmc.ncbi.nlm.nih.gov/articles/PMC4038932/