My daughter did a research paper on the idea and horrified her liberal professors! Apparently us guys are more needy and louder than girls in a class so the quieter well behaved young ladies were forgotten!
I blame the womenz for being the cute!
With all females in the class, I felt encouraged to speak up and speak out. If there was one male, I felt intimidated for some unknown reason.
There was a televised study on males and females in the classrooms years ago. Even the best teacher favored the male students. One was surprised to find that she was using the female students to help her teach while giving the male students her attention. (She would have the female students hold her open books while directing the questions to the males.)