I recently found this channel called The Khan Academy, basically it's a massive amount of videos taken from all over the internet, and stored in one place, they even have their own website, they teach Biology, Physics, Mathematics, Chemistry/Organic, Finance, Healthcare, and History. Their channel is loving awesome and I recommend subscribing to it.
disappointing that you haven't added my love position one to the OP
Almost everyone on the forums is a virgin, either way, why would they need to learn love positions since they'll only be performing around 5 of them? It's really not educational either.