Big brothers say lovely things like -
You are just the cutest baby in the world
Baby Seth is so coot
When you're big I'm going to show you how to play Star wars lego
You're just so lovely
I love baby Seth
I just love him so much
Can I see his face?
I just want to kiss him
EDIT 14/2 - If people say they don't think you're lovely, they'll go to prison.