Fishing Trip
Riddle: Two dads and two sons went fishing. They all caught one fish. They all brought there fish home, but they only came home with three fish. How is this possible?
Answer: There was a son, a father, and a grandfather. (The father was the sons dad, and the grandfather was the fathers dad. The son was the fathers son, and the father was the grandfathers son.)
Source: https://www.riddles.com/4353
