It's not fun for the teething baby. It's not fun for the brother who shares a room with the teething baby. It's not fun for anyone wishing to carry on a conversation in the same room as the teething baby.
There are a lot of stages of their childhoods that I'll miss. There are many moments that I am sad to see pass.
But not teething.
I can speak for all of us when I say none of us will miss teething.