" No surprise there—but the mind-boiling part is that men’s stress levels fell if they kicked back with some sort of leisure activity—but only if their wives kept busy doing household tasks at the same time (an effect I term While You’re Up, I’ll Take Another Cold One). When study author Darby Saxbe started looking at the data, she says, “We sort of thought it would probably be all the more relaxing to have leisure time if you have a spouse that’s doing that leisure with you,” she tells me. “So it was kind of surprising that we found the opposite effect—that the more leisure time dads had and the less leisure time wives had, the more men’s cortisol levels dropped.” The somewhat dispiriting conclusion: a man’s biological adaptation to stress is healthier when his wife has to suffer the consequences. "

― Jancee Dunn , How Not to Hate Your Husband After Kids