Dinner is late. The laundry isn't done. The pickles aren't sour enough. When it comes to reasons for a man to beat his wife, Rem Ran has heard it all.

For most of his 40 years, the construction worker saw domestic violence as "a normal part of life" in a nation where, until 2007, girls were taught in school not to challenge husbands via a traditional code of conduct still found in some textbooks.

Now he steps in when domestic disputes erupt in his rural community and is part of a nationwide drive to instill men as advocates for women's rights, as Cambodia this month also launched a national plan to combat violence against women.