On the last day of high school, one of my teachers give us such advice. Rather than spend the last day discussing another definition or formula, he talked about career choices, college classes, and marriage. We were quite surprised when he told us that he always cleans the bathroom, but we liked his reason - because he hated cleaning it less than his wife did.
Rather than worry about tasks being divided exactly 50/50, my husband and I use a similar strategy. We divide tasks based on who will dislike doing it least, who is best at it, and who can do it most efficiently. We don't keep score and we don't alternate nights.
How do you split up the daily chores? Did it change when you got married? Had kids? Experienced another major life event?