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.