In old days of the So, women performed writing brush lowering to be said to be "Cherry Boy difference" to inexperienced men in a certain village. And, in the present age, young women revealed own sexual organs as practical sex education in these facilities, and brought knowledge of the Sei and "Cherry Boy difference" to remember throughout the life to life to men whom there was not of the woman experience. Look at SEX of specialists of the writing brush lowering.
