A handy size reminisce that has almost nothing to do with eroticism - so congratulations to the author - but a history of the construction and mechanics of the subject. The illustrations are all drawings or copies of adverts - do not expect anything sexual. There are plenty of other books available that do that. A book that is informative and both warmly and concisely written.
I have no idea how the author managed it but by either accident or design she has contrived to remove every trace of eroticism from the subject matter in the title. Might be condidered racey by an Amish virgin.