There's public humor, and there's private humor, and they're all appropriate in their own way, and you shouldn't - just as you wouldn't have a megaphone and say certain things that you would say around your friends - things that are perfectly all right within your close social group with whom you share a certain context.

In this quote, Robert Mankoff makes a distinction between public humor and private humor, asserting that each type of humor is appropriate in its own context. Public humor, which is often shared with a broader audience, requires a certain level of restraint and sensitivity, as it must appeal to a wide variety of people. Private humor, on the other hand, is more personal and intimate, often used within close social groups where there is a shared context and understanding.

Mankoff uses the analogy of a megaphone to illustrate the difference between these two types of humor. Just as one wouldn't use a megaphone to share private jokes with close friends, humor that is meant for a specific group or situation should not be broadcasted publicly. This emphasizes that context is essential in determining what is appropriate in terms of humor. A joke that works well in a small group setting might not be suitable when broadcasted to a wider audience, where the context might not be understood or appreciated.

The quote also highlights the importance of social awareness when it comes to humor. Mankoff suggests that individuals should be mindful of the audience and the environment in which they are sharing their humor. Humor that works within a certain circle of friends may not translate well to a larger or more diverse group, as it might lack the shared context needed for it to be understood or well-received.

Ultimately, Mankoff’s statement underscores the idea that humor should be flexible and adapted to fit the social setting. Whether public or private, humor is a way to connect with others, but it requires an understanding of the context and boundaries of different situations. Knowing when and where certain jokes are appropriate is key to maintaining respectful and effective communication.