Carling: Exclusive 'Decorators' Ad - It's a Boy

I really wanted to talk about this advert.  

"But It’s Not Quite Carling

What does it mean? 

You have to get refreshed by drinking Carling?  Or you get refreshed by drinking Carling?  Either way, I didn't get this bit.. because I'm not quite understanding the brand personality of Carling (yet).  

Although I enjoyed the last part saying

 "Next time? She's pregnant again!?"