Who can tell me a joke?

A bull and a cow are grazing by the roadside. Suddenly, the cow saw an expert coming from across the street and said to the cow, "The expert is coming!" " "When he finished running, the bull asked the cow," What did you run when the expert came? "? The cow replied, "Now experts love to brag!" "The bull began to run. The cow asked the bull, "Here comes the expert. What does the bull follow? " The bull said to the cow, "You don't know that experts nowadays not only like to brag, but also like to pull eggs!" " "