In part it's because he's the youngest by 10 years and in part it's his personality; he is exuberant. He is enthusiastic. He's charming, communicative, engaging and not one to be ignored.
But he's not the youngest any more.
When I went to take the four week photos of this little lady, the preschooler turned into a Wild Thing. He's been a wild thing a lot lately.
Fortunately he is never a wild thing to her, only to us: his loving and wee bit exasperated parents. Towards her he is the most loving. The sweetest. The most kind.
When you and your brother get back your supper will be waiting for you. And it will still be hot.