The paradox of hedonism is when someone tries to make themselves happy by doing something fun, but it doesn't always work. Even if you do something fun, you can still end up feeling unhappy. This happens because when we focus too much on chasing pleasure, we can forget about our other needs, like spending time with family, finishing important work, and taking care of our bodies. Trying to be too happy all the time can also become stressful and make us feel even more unhappy.