ELI5 Dopamine - is it really the feel-good chemical?

Can we just manufacture a pill for it? Why does it have feel good properties? What’s the difference between Dopamine and Serotonin? What happens when you don't have enough of it?   ... We explain like i'm five!     Thank you to the r/explainlikeimfive community, and specifically the following reddit users whose questions and responses formed the basis of this conversation: didudes, optrode, ferfymoe, klarok, petiteplethora, ladybirdthecat, 0thegingersoul0, daniel-tigers-dad, psnivy1, pythonpoole To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Send us an e-mail: [email protected]