"Practical sex education," which began as part of measures to counter the declining birthrate, means that teachers use their own bodies to provide "direct" sex education guidance. The new wife teacher who just got married last year is confused but will educate the students with her own body! "In order to get pregnant, I insert an erected male genitalia into the female genitalia on a dangerous day and shoot it toward the uterus. Look closely when I get pregnant."