Some guys are sitting around the dinner table. Several finish their first portions and help themselves to seconds.
Specimen of good health is still working on his first small serving. Rather boastful, says to the others “you know you can eat less and still be satisfied if you just eat slowly.”
“How’s that?” someone asks.
“Well it takes 15 minutes for your brain to signal that your stomach is full. So a person could be satisfied with less.”
Discussion comes to an uproarious end when the comic in the groups says “So, I guess according to the previous argument, the band should be put around the brain.”