I know who Sean Penn is. My best friend in high school lived next door to the Sheen/Estevez family in Malibu. We occassionally partied with the Brat Pack members. I've partied with Penn, had conversations with him. Granted it was many years ago, but I don't think intelligence spirals downwards in this way unless biology has been unkind to him... which is possible. I've spent weekends at the house next to Johnny Carson where Sean and Madonna were married. I do know he is a thinking sort.