Read this! I had a pretty average day and felt rather grumpy as I started reading this. One of the first sentences says:

scientists have recently found learning new words can stimulate exactly those same pleasure circuits in our brain as sex, gambling, drugs and eating

Grumpily I thought “meh... not so sure about that”. Ironically the article has proven its own statement to be true by introducing so many new terms to me that I was sitting here literally laughing out loud while reading. Grumpiness resolved thanks to learning new words (which apparently is equivalent to having sex)