It should be noted that "break them in" or "make them one of the boys" applies just as much- if not more so- for the MEN working in those "men's work" positions than it does for the women.  Hazing and "rights of passage" exist for both men and women alike.  It should also be noted that men who conversely work in what is considered "women's work" experience very similar issues of being singled out, just in (obviously) less physically dominating ways.  Basing this issue on genders is both fruitless and disingenuous, since it happens to both men and women, with men reporting it far less per incident than women.