They could try listening to women about their experiences.

That's kinda the whole point of the article - to raise awareness of an issue that women face. This is not about taking sensitivity classes, it's about accepting that there is a problem, and doing something about it as part of a community that wants to be more accepting towards women.

most men have a mother. Many have wives, sisters, daughters, aunts, female coworkers, and so on.

By listening to them, we can learn what sorts of things they experience, and perhaps learn not to do things to other women that we know would bother our mothers, wives, sisters, daughters, etc.

The answer is in panel 6 here: http://achewood.com/index.php?date=12112007