What does father's joke about earthworm fishing mean?

Do things carefully, don't make decisions on impulse.

1, meaning: this joke means that you should think carefully when you do things, and don't make impulsive decisions because of temporary excitement. At the same time, it also reminds us to pay attention to our own safety, and don't cause unnecessary harm because of coveting temporary happiness.

2. In the story "Father Earthworm Fishing", Father Earthworm is a fishing enthusiast. He often goes fishing by the river, but his skills are poor and he always fails to catch any fish. Finally, father earthworm used himself as bait and was finally eaten by fish.