Fine, it's not really science. But it's plausible enough, right?
No? Whatever. Sometimes, people are assholes — at least this video takes the time to try and make sense of that assholery by committing it to a particular recessive gene that may or may not be passed down by one's parents.
It's a fairly long video, at 13+ minutes, but it's a fairly good laugh. Just keep headphones in, if you don't want to have someone nearby at work wondering why they keep hearing the word "arsehole."
[h/t: Laughing Squid]