As a genral rule 80% of the males in the wild will shoot up above the females, then open their flowers and dump pollen on the just starting female buds. They are plain to see and should be removed ASAP to free up the space they are occuping. Instead of letting them live, a female could be happy in the space wasted on your male.

Once a male shows there is no going back. Rip it out and reuse the open space. Every once and awhile a plant will look like a female (bushy, Like#6) and it will go male at flower. Those are the ones that hurt.

Good luck and may a male never show its face in your room.