There is a lot of research that personality traits on political leanings are correlated. So maybe that same common cause also affects humor? https://pmc.ncbi.

There is a lot of research that personality traits on political leanings are correlated. So maybe that same common cause also affects humor? https://pmc.ncbi.nlm.nih.gov/articles/PMC3809096/#:~:text=The%20results%20suggest%20that%20personality,innate%20common%20underlying%20genetic%20factor. https://pmc.ncbi.nlm.nih.gov/articles/PMC3809096/#:~:text=Th...