Pillow Talk: Books are great resources for sex education

... intended primarily for couples with a fair amount of flexibility. For the less flexible or older couples, I recommend a yoga class to limber up before attempting some of the positions, such as the "Torrid Tripod" or the "Depth Charger". This book's ...

http://www.studentprintz.com/2.863/pillow-talk-books-are-great-resources-for-sex-education-1.32280