We have all heard the common saying "opposites attract," whether it be in elementary school science class or our parents talking to us about relationships. This theory seems logical; why would you want to be around someone just like you? We are all led to believe that this deems true, but it turns out, it is not. The idea that we attract people who are actually similar to us is known as assortative mating. This includes mating based on age, race, facial characteristics, and body type which all have to do with our genes. Couples tend to seek partners with similar DNA, and this is proven more common than seeking a partner based on socioeconomic status or education level, which was believed prior to this. Researchers studied single nucleotide polymorphisms which is where humans differ in DNA. It was found that married couples were more genetically similar than those chosen at random.