At some point the female comes in and lays her eggs with the male fertilizing the eggs in what looks like a slow dance as good as fish can dance I guess. After that the female moves off and the male bass remains to guard the nest. In some cases the female is observed hanging around the nest and both fish will guard their brood.
If an angler times things perfectly there will be male bass beginning their nest mode with the females lurking nearby. I might lose my self-control and pick one or two males to educate them a little at the start of the season but it may cost me a larger fish down the road.