Last year I wrote an article about conservatives being a human/reptile hybrid. That would probably screen out a sense of humor.

“In the mid-20th century, conservatives had a problem. They knew a philosophy of greed is good and compassion is evil would be a hard sell to healthy human minds. One possibility was to stop being assholes, but that never crossed their minds. They wanted another solution, and science provided it.

Reptile DNA.

They realized it would take cold-bloodedness to tolerate their cold-blooded beliefs. They extracted genetic material from a hybrid Buffoon Viper (Bitis rogerstoni) and spliced it into Homo sapiens individuals. The result was a subspecies dubbed Homo sapiens reaganum, and the modern Republican Party was born."

https://medium.com/doctor-funny/what-if-conservatives-just-stopped-being-douchebags-43f2e22b50f9