We spend a lot of time on the subject of sex education in the schools. Maybe it's time to introduce mandatory courses in parenting -- for boys as well as girls. Parenting skills, difficult enough for the lucky half of us [who were brought up in values-oriented two-parent families] to acquire, are all but impossible for the unlucky half to come by. And yet nearly all of them will become parents. We'd better start doing what we can to help them do it right.