Couples want to share the household and child-rearing. Why do they fail?

He's shopping.

I do the laundry.

We take turns taking our daughter to daycare and picking her up again.

It reads as if my friend and I had achieved what many couples - with and without children - strive for: the tasks are divided 50/50, everyone knows exactly what they have to do, nobody has to be frustrated because they are or she

and the partner

.

But our reality is different.