There is no doubt that our brains harbor some clever and amusing thoughts, however, I would argue that not all these ideas are actually "inside jokes" in the true sense of the phrase. An inside joke implies a shared understanding between two or more parties, and as your brain is essentially a singular entity, it cannot truly experience the same kind of humor a conversation between friends or family can. It is likely that when our brains process something humorous, it is simply a recognizable pattern that our brain has become familiar with, and not an inside joke per se. UrRong;an inside joke is something that is shared and experienced by multiple people, not just the individual brain.