Final answer:
The reasons for the caution about striking are not explicitly stated, but it can be inferred that the men may be cautious about striking due to various factors.
Step-by-step explanation:
In the given text, it is mentioned that a couple of male speakers seem to be urging girls not to strike. The reasons for their caution about striking are not explicitly stated in the information provided. However, based on the information provided, we can infer that the men may be cautious about striking due to various factors. For example, one of the reasons mentioned is that men did not want to be involved. It is important to note that this is an inference based on the information provided and may not fully capture the reasons for caution about striking.