Over the next week, we can enjoy the benefits of increased dopamine. This chemical—responsible for the rush one gets on heroin or after performing a death-defying stunt—is responsible for reward-driven learning. 'It allows us to expand our behaviors outside of our routines, decrease our intensity, and essentially blend with the energy of the moment. If acetylocholine is the ultimate memory neurotransmitter, dopamine is the ultimate experiential one. Functionally, it serves us best when we're doing social activities we enjoy.' In other words, it's party week.