Cas has NO idea what the fuss is about tbh. So yeah, Cas’ first human words were kind of… boring (unless you’re Dean, because he’s going to be telling this story to whomever looks even vaguely interested, beaming like a proud mom and laughing uncontrollably at turns. Cas is still incredibly unimpressed with it when he’s older.)
So, little Cas’ first words were a popular topic: I got several more questions regarding this, hah. After this there’ll be conversations like this:
'Cas, can you say 'Enterprise'?' 'Yes.' '…okay, mr. smartypants.' …Dean does feel kinda cheated Cas didn't go through the cute parrot-phase like Gabe did.