A society which sees her modesty or her "hang-ups" as a problem is necessarily a society which will not be able to get him to commit. Conversely, a society which respected modesty, or what now goes by "hang-ups", was one in which men were obligated.
Remember, changing someone’s hang-ups is an easier task if stays in the realm of sex because the carrot at the end of this trip is—SEX! It’s not so easy to change other aspects of a man’s personality because the rewards aren’t as apparent and you can’t exactly screw the stupid out of someone.