The humor might come from the funny position the old man is in while asleep or maybe the expressions on his face.
It could be that the old man is snoring loudly or has some odd dreams that are shown in a comical way. Also, the surrounding environment or any animals nearby might add to the humor.
It could be funny because of the old man's funny sleeping position or the expressions on his face.
The cartoon man might be asleep because he's recovering from an illness or because he's in a peaceful environment that makes him feel relaxed and sleepy.
It could be that the chair is super comfortable and he couldn't help but doze off. Or perhaps he stayed up late the night before and now needs some rest.
It could be that he stayed up late the night before and dozed off while using the computer. Or perhaps he was dealing with a very boring task that made him sleepy.
Maybe he's had a really long and tiring day.
Well, there could be various types. Maybe a bedtime story cartoon or one in a fantasy setting where the man is in a magical sleep.
It might show a man slumped over the desk, head on his arms, with maybe some papers or a pen nearby. The background could be a dimly lit office.
Maybe he was just too tired and needed a snack before dozing off.
Yes, it is quite normal. As people age, their energy levels decrease and they tend to get tired more easily. Reading a bedtime story is often a relaxing activity, and the combination of a quiet environment, the act of sitting or lying down, and the gentle rhythm of reading can easily lull an old man to sleep.
Old cartoon humor often relies on slapstick comedy, funny voices, and exaggerated expressions.