I grew up in a house where there was lots of teasing and language play and laughter; it was very important. When I was a teenager, you wouldn't go to a bar and find lots of televisions everywhere. People were talking. Talk was the mental fire you would gather around in the evening. It occupied a big part of your existence.
You can laugh at somebody because they are innocent, and because they are naive or they are about to walk into a wall, but if somebody's giving you stuff, if somebody's talking, giving you their take on things, what makes you laugh, generally speaking, is going to be somebody who is telling it in an angry way.