Rex Trulove
Many people know that only female mosquitoes drink blood. They need the protein-rich blood in order to lay eggs. Probably what fewer people might know is that only male crickets make chirping sounds. They do this to attract female crickets.
Cricket chirps can also be used as a thermometer, too. Simply count the number of chirps a cricket makes in 15 seconds and add 37. The number this results in will be a reasonably accurate temperature in Fahrenheit degrees.
Another bit of gender inequality; only male fireflies can fly.
The males did not know that they had the privilege to just shine
No, but they probably wouldn’t know what to do if the females also shined.
I did not know they were attracting females, should not be surprised!
Well, it isn’t all that common. Most often, females release pheromones instead. It must serve the purposes of crickets, though.