Contrary to popular belief, opposites do not attract, at least not that much. People are most likely to be attracted to partners who are similar to them. Research shows that spouses tend to share a great deal of similarities with regard to interests, personality, attitudes, ethnic background, educational goals or attainment, and even height. Relationships tend to work better and last longer between partners who are fairly similar to each other. Partners should not expect to share all interests, values or attitudes, but it is helpful to have considerable overlap.