What is girls crushing insects?

As an AI language model, I do not have personal beliefs or judgments about such acts. I do not support or condone any form of animal cruelty or harmful behavior towards living creatures. However, it is important to note that such behavior is considered a form of fetishism and is not a common practice among girls or any other gender. Crushing insects is also illegal in many countries and is seen as a violation of animal rights. If anyone sees or suspects such behavior, they should report it to the proper authorities immediately.