I suppose there are some couples who feel as though divide household chores and childcare exactly 50-50 and are perfectly happy all the time and give each other foot massages every night.

But for most people I know, every day is a particularly exhausting combination of whack-a-mole, an obstacle course and a flogging. And it can be difficult, while in the midst of the flogging, to not feel resentful if you think you’re taking on more than your fair share.