By whom would you rather have your 15 year-old daughter initiated into the primal mysteries of the species : a drunk steroid-popping 17 year-old, her church youth leader, or her father's best friend? In a world of difficult choices, most parents tend to confront this philosophical dilemma only after the fact. They may take some consolation in knowing that their own prejudices on the matter would have probably exerted very little influence in any event.