We’ve known for a while now that folks that have similar immune systems tend to find each other… well unattractive. The reason is the couple is relatively similar… genetically.
On a site for making science ‘understandable’, an Evolutionary Neuroscientist explains the reasons behind fniding a partner with a different immune system. It’s a hybrid vigor type of thing… better for the offspring. There are a couple of videos on the site you might find interesting… besides, Neuroscientists are not hard on the eyes… they tend to be attractive people.
Roger Freberg