The differences between women and men are not only well-documented, but frequently at the heart of jokes, anecdotes, and good-natured (and not so good-natured) ribbing. Experts have discovered that there are actually differences in the way women’s and men’s brains are structured and in the way they react to events and stimuli. So the next time your wife, boyfriend, or parent starts telling you how you should have done something differently, then refer back to these big differences between men’s and women’s brains.