fat ass

I saw a man today.
He had a Slim Fast can in his hand.
He walked into a Starbucks while I was waiting for my coffee in the car.
He finished the can and threw it away as he walked into the store.
I figured he must have tons of control to drink nasty Slim Fast while working at yummy Starbucks.
A few minutes passed...
The man walked out of the store; with a VENTI on his hand!!!

What was the point of the Slim Fast? Was that your appetizer?