Ernie learns not to eat cookies in his bed.
This is another one of my all-time favorites. I don't know how effective the lesson was, though, because I still eat snacks and even whole meals in bed sometimes.
I really like the dramatic way that Ernie says, "And I'm never going to eat cookies in my bed a-gain!" Also, I never noticed it until just now, but just as Ernie says, "If I eat the cookies in bed, I'll get crumbs in the sheets," a little piece of cookie coincidentally falls off the plate, and he looks right at it as if to say, "See?"
I've said before that the dynamic between Bert & Ernie reminds me a lot of the dynamic between my older sister and myself, particularly in the early days when we had to share a bedroom. This sketch reminds me specifically of the time I broke my sister's bed by jumping on it. (Or maybe by jumping off it; I seem to remember using the bed as a launching pad of sorts. She wasn't in the bed at the time, I should probably point out.) Understandably, she was pretty upset about that. What's interesting is that my parents must have also been angry about that, and yet it's my sister's ire that I remember.