"In a book that draws deftly from a range of scholars and theories, Castro-Vázquez invites us to consider the biomedicalization of the practice in the sociohistorical context of gender and sexual ideology in Japan. ... the book is an important contribution to the sociology of masculinity, of sexuality, of bodies, of medicine, and of knowledge and thus, a worthwhile read." (Amanda Kennedy, Men and Masculinities, Vol. 20 (1), 2017)