Make up your mind!

A family goes on a picnic on a particularly beautiful Sunday. The father and son are flying a kite on the meadow. The kite is going in circles and crashing. The father comforts the son and the mother yells, "You need more tail!"
The father then says to his son, "Son, I will never understand your mother. Last night when we were having'fun,' I asked her for more tail, and she told me to 'Go fly a kite.'"