British and Swedish researchers teamed up to discover if there were any genetic clues showing that some individuals were predisposed to be dog owners. After testing around 35,000 pairs of twins, the researchers identified that there are specific genes that do have significant influence on whether or not one owns a dog. These genes also have influence on the interactions between dogs and humans. This leads to the researchers believing that some have a more innate response to take care of a dog. Another finding is that these genetic linkages may also show health benefits from owning a dog. Personally I can see how some are more innately dog owners and others are cat owners. From personal experience, I have always known I was a dog owner, and it is really cool to know that this could be due to my genetics!