How do you feel about the "Opposite Attracted" sentiment?

I would like it if this is a random sentiment that sometimes happen, sometimes not. We need the sims in TS4 to be unpredictable, and sentiments such as this one, if it was random (meaning it could happen with one sim but also possible for it not to happen with another sim with the exact same traits that filled the same requirements) could make playing and meeting sims more exciting.