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?