Having My Baby

On Friday a woman the Quarterdeck restaurant asked me if I was expecting.
This was, mind you, not a stranger, but someone who knows that I already have four children – I was holding one when she asked.
“Ah, no, not me. That's just 19-month-old, residual, baby fat that I'm trying to hide. Thanks for pointing it out though. I'll be heading home now.”
When does baby fat stop being baby fat and make the shift to just plain old fat?
When the baby can walk?
When the baby can talk?
When the baby begins studying for his Phd?

song: Having My Baby • artist: Paul Anka