When my oldest son was about getting interested in sex I gave him back issues to Playboy, and bought the Joy of Sex book for him. He established a lending library for all his friends. I only remember one of his friends' mothers complaining that her son had found sex info at my house. That was the mother who allowed my son to watch R rated scary movies that gave him nightmares. I explained that I thought sex was natural and real, and was better to expose the boys to than fantasy scary movies.