Japanese magazine AnAn recently made a sex special edition. This magazine made the special, with some collaboration from the Japanese Government, to try to incite Japanese girls to practice more sex and give birth to more girls (One big problem in Japan nowadays).
The first part of the magazine explains to the girls how to turn on their boyfriends and another part is full of typical questions with explanations from an expert and the last one if full of interesting charts.
They even included a DVD with real actors explicit explanations that caused a little revolutionÂ among the girls in my office.
Some page from the magazine below: