I spent a long time thinking about what to write for this.
The obvious connotation of the phrase is love. Do opposite personality types attract? Probably. There are so many of us in this world that it would be strange to think we were all attracted to people like us.
And then I thought about a scientific discussion. Magnets famously repel magnetic fields that are the same. So opposites in this sense - positive and negative attract. But then my husband pointed out that magnets also attract neutral, which isn't an opposite. So that became a dead end.
The only other thing I ended up with was a song by Paula Abdul, from back in the 80s, 'Opposites Attract'. You know, the one with the cartoon? And I've been singing that for days now.
Thanks Sara :-)