This is actually a serious scientific study. According to research by one scientist brain parasites spread to humans by cats shape how humans behave.
"Now, Kevin Lafferty from the University of California, Santa Barbara, has found startling evidence that a common brain parasite, Toxoplasma gondii, could be influencing human culture across the globe.
Toxoplasma gondii is a single-celled brain parasite spread by cats. Our feline companions are its preferred home and only there can it mature and reproduce. So like most parasites, T.gondii has a complex life cycle designed to get it into its final host."
"Brain parasite drives human culture" NotExactlyRocketScience
Brain parasite drives human culture