I have read a wonderful and well-written book on masturbation by Betty Dodson. It is called Sex for One. I also gave my 17 yo daughter a copy for her birthday so she may be better informed on this important subject. Here is a short review of a book I feel every adult should own and read.
Confronting one of our last and most deeply rooted taboos - masturbation - noted sex expert and pro-sex feminist Betty Dodson, Ph.D., takes the shame out of self love by creating a straightforward and appealing guidebook that reveals masturbation as a satisfying, vital form of sexual expression.