Jordan Peterson is a psychologist who articulates interesting ideas about politics, society, philosophy, literature, mating, self-development, etc. He explains an interesting phenomenon in lobsters: Cliffs: Every time a lobster wins a fight [against another lobster], his serotonin [neurochemical responsible for feelings of happiness & well-being] increases. The more fights the lobster wins- the more he expands in confidence and is likelier to win the next fight. Every time a lobster loses a fight [against another lobster], his serotonin decreases, body coils, and becomes less likely to win a fight afterward. Antidepressants reversed this effect in lobsters. The reason I post this in an MMA forum is that I think there might be an interesting parallel with that phenomenon and MMA fighters. When fighters lose we often see a deterioration in skill/abilities with them in their next fights. When fighters accumulate win-streaks they look scarier and scarier. We evolved apart from lobsters millions of years ago but we still crudely share that relationship with serotonin. It also explains why fighters "developed" through cherry-picked matchmaking generally become better fighters than fighters that go through the gauntlet from the start. Thoughts?