Ever flip through a free clinic's sex self-help brochure and wonder who was responsible for the images? If not, there's always a first time. This one, found on Neojaponisme, really had me wondering. And laughing.

Have A Nice Sex is a book about anal action, found in a Tokyo free clinic. The illustrations and instructional diagrams are more like bored classroom doodles. Man on man on man? That's in there, with penises represented by  what looks like elongated greater-than signs. 

While it's Not Safe For Work, the gallery of images from this pamphlet are definitely worth a look.