Study found the more often couple smoked cannabis, they less likely they were to engage in aggressive acts towards each other.
Researchers from Yale University, University of Buffalo and Rutgers followed 634 married couples for nine years.
They found that when couples used cannabis three times or more each month reported the lowest number domestic violence incidents (intimate partner violence) over the first nine years of marriage.
Intimate partner violence (IPV) was defined by the researchers as acts of physical aggressions, including hitting,
beating and chocking.
The couples completed regular questionnaires throughout the study on how often they used the drug and other substances, such as alcohol.