When we think about stay-at-home motherhood, it’s often in the context of the “mommy wars,’’ the overhyped state of judgmentalism that inspires guilt, attachment-parenting manifestos, suspicious glances on playgrounds, and cathartic chick lit. What we don’t hear, so much, is the husbands’ point of view - maybe because it isn’t always pretty. A new research paper posits a controversial, husband-centric explanation for why women are so underrepresented on corporate boards and in executive suites: What if some companies are unfriendly to women, because they’re run with men with stay-at-home wives?