Everything I am about to post is completely hypothetical- I am not planning on doing this, it's just a thought.
I was thinking about betta sororities and it me think about the personalities of fish. Females can be put together only if the temperate (?) is right. Both females need to be mildly tempered, and overall, a non-aggressive fish. As many people like to emphasize, some females can be as aggressive as males. But can't males ALSO be as mild as females? It's rare, I know, but it sometimes happens. If that did, would it be possible to put the male and females together? Just a thought, to get you guys thinking. :)
Let me know!