Birthday by proxy

Yesterday evening, as we were trying to put Wolfie to bed, he got quite upset when he learned that it was going to be my birthday soon, but not his. He thinks that it is about time we celebrated his birthday as it has been a while. I tried to explain to him that we celebrate each birthday only once a year and it will soon be daddy's turn, and also that, in any case, he can still enjoy someone else's birthday. And that there is also at least one of the presents that I receive which will truly be for him to enjoy as well (my wife always makes sure of it). And there is one thing that is difficult to explain, especially in words understandable to a three year old boy: once you have kids, it's always all about them. Every birthday, every celebration. And this will be the case until they have children themselves. And that is fine like this.