Remember that book from back when we were so much younger, The Joy of Sex? Published in 1972, it seemed incredibly explicit for a mainstream book, which is probably why it spent 70 weeks on the New York Times Bestseller List and has sold over 12 million copies. I’ll admit to looking through my parents’ copy, and I’m confident a whole bunch of you did the same.

A lot’s changed since those days, as significantly more explicit material (remember the book’s simple sketches of that very normal looking couple?) is just a click or two away. Much of the current stuff, however, is more about titillation (and another four-syllable word that ends with “…tion”) than instruction.

So where can you go to get some pointers on sex?