" I know about safe sex," Nathan said, interrupting Jack's thoughts. Jack swallowed. " That's good." He smiled at his son, vastly relieved that there would be no hard questions about his own sex life. " What I want to know is..." Nathan stole a quick look back at the tent. " Where is the clitoris exactly?" Jack's smile fell and he opened his mouth. No words came out so he closed it. Nathan had no problem forming his words, though. " And what the heck is a G-spot? "