It is sometimes both extremely entertaining and horrifying to hear teens discuss sex and related topics, when they don't think there's any risk of being overheard. Case in point, I heard my teen cousin describe a Christina (piercing) as "Isn't that like a ring through your vagina!?" My thought: Hahaha, WTF! No, honey, that sounds more like a freak accident. I certainly don't know everything, but at their age I was looking up and reading everything! I guess I have an idea of what I could get them as a gift: An illustrated dictionary of erotic piercings and a 1st year university biology textbook. One should at the very least know the difference between a vagina and a (part of the) vulva.