From http://quotes.watchtower.ca/women.htm : (highlighting mine)
It is high time for girls to understand the make-up of their bodies and its functions, especially with regard to sex. Then if a girl understandingly takes care of herself while the ovum is at large and is causing sex disturbance and cravings within her, she will be able to act like a true lady of irreproachable morals at all times. She will avoid the violating of her virginity and the shame and conscience-stricken state due to this; and wisely she will direct her young life so as to end up in the position of a clean, happy wife and mother of legitimate children, journeying to the new world of righteousness, where there will be no sex problems amid a sex-crazy population.
This is from a 1961 Questions from Readers. So by "takes care of herself", do they mean she should get herself off so that she can avoid plastering herself all over the PO's son at the next book study??