The point is something else for the Male to bother with. Takes the focus away from bugging the female all of the time, to keeping the other fish at bay. Tankmates help a lot when it comes to keeping pairs together. Sometimes when separated without any other fish in the tank, a male will turn on a female and kill it. This usually doesn't happen when there are other fish present in the vicinity. If you don't want cons as dithers, go with something else. Either that, or you can just chance keeping the pair alone.