On first hearing that little voice – as fine and friable, I felt, as cotton thread, the impact on my soul was that of the highest magnitude of earthquake, those that occur every hundred years, say, or every thousand. The old shell I called myself cracked and was swallowed by a sudden crevasse, and just as suddenly was lost in the commotion.

Throughout history, the most brutal cultures have always been distinguished by maternal-infant separation.

We watched each other evolve into parents, with all the fear, rage and confusion evolution can involve. Our eight-year-old is the incarnation of our union; we are forever fused by her blood. My old take on romance seemed vaguely ludicrous, as affected as a pair of spats. I no longer saw the point in 'getting back to normal', that pantomime of pretending nothing had changed; I wanted to evolve from sexual posturing into a deeper consciousness, that of love.

I don't know why I wanted a girl,' he says, as if to himself. 'I mean, I wouldn't swap Louis, but when they said, 'It's a boy!', I thought: 'Oh, well.' Everyone else was incredibly pleased that it was a boy – grandparents are always very pleased when it's a boy for some reason. Another one's on the way, and I hope it's going to be a girl. After that, I'll stop. I think it can be a real mistake to sort of plug away for a particular sex … you end up having millions and they're all boys.