Frida 和 Björn 有孩子，有一套不错的公寓和他们喜欢的工作。 然而有些事情并不完全正确。 也许我们的生物学比我们想象的更能说明我们的幸福。...

Frida and Björn have kids, a good apartment and jobs that they are happy for. And yet something is not quite right. Maybe our biology has more to say about our happiness than we assume....