I apologize that your mother didn't let you watch the puberty video. Puberty is not something to be afraid of. It's literally your body maturing, and it makes perfect sense to let people know what they're going to be going through soon. Immaturity exists for a long time, but there's no need to try to stand away from it. The kids who can't help but talk about snakees and vaginas as if they're cool are just trying to cope with the new found freedom of talking about reproductive systems. Let them, soon they'll figure out it's no big deal.