Emotional talk tends to produce more physiological arousal in men—they experience it more stressfully.
Unlike women, they don't get the oxytocin reward that makes them feel calm, secure, and confident when talking about emotions and the complexities of relationships; testosterone, which men produce more of during stress, seems to reduce the effect of oxytocin, while estrogen enhances it.
It takes more work with less reward for men to shift into and maintain the active-listening and self-revealing emotional talk they learn in therapy, so they're unlikely to do it on a routine basis.
http://www.alternet.org/story/147268/do_men_love_differently_than_women
