playing poker with yourself

A 12 year old boy comes home from school and walks into his parents' room. Mom and dad are in bed making love. The boy asks, "What are you doing?" His dad replies, "Playing poker. Now get out of here." He goes to his older sister's room to find his sister and her boyfriend in bed making love. The boy asks, "What are you doing?" His sister replies, "Playing poker. Now get out of here." He goes to his older brother's room and finds his brother masturbating. He asks his brother, "What are you doing?" His brother replies, "Playing poker." The boy asks, "I thought that it takes two to play poker." His brother replies, "Not if you have a good hand."