Big Boy's New Bed, and Teeth

Yesterday, Big Boy got a new bed. It's a loft bed with stairs up one side and a desk on the other side. When we went to the furniture store and saw the bed, he was so excited and he kept asking for a stairs bed. We'd already planned on getting him a loft bed and that was pretty much the only one they had at the store, so it worked out perfectly.
Anyway, we watched the delivery guys set up the bed with their drills, and Big Boy spent the rest of the day working on the bed, with his own drill, hammer, pliers and wrench.
Throughout the day, when he misbehaved, I told him maybe he wasn't a big enough boy for his big bed, and maybe he wasn't going to sleep in there. I told him maybe he could sleep in Little Boy's crib.
And at dinner, I told him he was getting a bath and he said he wanted a shower like a big boy. But then he asked for help taking bites of his grilled cheese sandwich. I said, "If you're not a big enough boy to eat your sandwich by yourself, then maybe you're not a big enough boy to take a shower."
He said, "I'm a big boy, look at my teeth."
He opened his mouth (full of grilled cheese, of course), and pointed to his teeth.