Final answer:
Long-term relationships are more often built on similarities rather than differences, with shared backgrounds and interests leading to greater compatibility and ease of interaction, thus supporting the notion that "birds of a feather flock together" rather than "opposites attract."
Step-by-step explanation:
The main answer to whether "birds of a feather flock together" or "opposites attract" is more common in long-term relationships is that people are more often attracted to others who are similar to themselves. This concept, known as homophily, suggests that we form connections more easily with those who share our background, attitudes, and lifestyle, as these similarities facilitate smoother interactions and shared activities, creating a stronger bond over time.An explanation in more than 100 words for this phenomenon can be found in social psychology research which indicates that shared cultural backgrounds, values, and interests contribute to compatibility and understanding in relationships. The presence of common ground makes decision-making about day-to-day activities and life choices easier, which in turn can lead to more stable and enduring relationships. Furthermore, similar people are likely to have similar social networks, reducing the potential for conflict and increasing the possibility of social reinforcement for the relationship.In conclusion, while the adage "opposites attract" might make for interesting stories, the reality of human social behavior indicates that similarities form the basis for most long-term relationships.