WHY is anyone surprised about the wave of cooing and affection that’s swept the nation since the safe delivery of little Prince George?

He’s a baby! And normal human beings are pre-programmed to go completely ga-ga when confronted with so new and tiny a little person. We can’t help it.

As Kate so aptly put it: “It’s very emotional and such a special time, I think any parent will probably know what this feeling feels like.”

Oh yes. And yes again.

Seeing Kate and William on the hospital steps, tenderly cradling their little son, who wasn’t taken back to the same golden minutes in their own lives?

Watching Kate and William manage that first, tricky public handover of their precious bundle, who didn’t remember the moment they did the same, terrified they might hurt or drop their new baby?

Witnessing the Prince’s tiny hands appearing to give his first royal wave, who wasn’t transported back to those delicious moments when we watched our own babies do the same, amazed by this new little human?

My kids are 18 and 21 now. But when I look at them, sometimes all I can see are the two scraps of human life that we whisked away from a hospital, like Prince George, strapped oh-so-carefully in a car seat.

And that’s why, despite the fact that Kate and William know their son will never have to worry about paying the gas bill, or getting into university, or choosing a career (his job description already reads ‘King’), they will still have all the worries and concerns that every other parent experiences.

All the money, power and privilege in the world won’t stop their hearts from feeling as if they are being torn in two, every time he cries.

When he doesn’t feed or doesn’t eat, Kate will probably sob with frustration while William flicks helplessly through the baby books.

When he has a rash in the night they will both agonise over whether it’s meningitis and argue about calling the doctor. If he ever goes missing in that vast Kensington Palace apartment or the grounds of the royal estates, time will stand still for them until he’s found again And, at the end of each day, they will probably find themselves just staring at him, wondering at the miracle of it all.

Critics have sniffed on about the gilded life he’s been born into; palaces, a fleet of Range Rover Discoveries, a vast fortune, but they’ve missed the point. His greatest asset is his two loving parents.

Kate has always had a mother’s love to guide her but William has not. He was just 15 when he lost Diana and how many times must he have wept and wondered where she’d gone?

Now he’ll find out. When his little son cries and he cuddles him, when he realizes that he instinctively knows how to make him laugh, when he finds himself repeating some long-forgotten song or nursery rhyme, he will realise. Diana never left him, she was always there deep inside and George will help him find her again.

For all parents, royal or not, the birth of a baby is a chance to turn over a new leaf; to remake our lives again, to be better for this little person for whom we are now responsible. For the rest of us George’s birth is a quiet reminder that everyone should do all they can to make the world a better place for him and all the babies to come, who are no less beloved or important.

I wish Kate and William all the joy in the world. Being in the Mum And Dad Club is like being on a rollercoaster from which you can never get off. But oh, how they will adore the ride.