我猜可能是异性相吸吧。

I guess it was a case of opposites attracting.

这就是异性相吸的原因所在。

This is why opposites attract.

他跟你既不相同又有很多相同点。异性相吸的说法有道理，然而物以类聚也是如此。

They're Different Yet the Same - it's true that opposites attract, but it's also true that birds of a feather flock together.