Dopamine and Its Focusing Affect on the Brain

Dopamine doesn’t manage pleasure so much as it manages how interesting stuff appears to our brains. I came across an ask.metafilter.com question about how to manage anger. A lot of people indicated that exercise (one person mentioned sex specifically) was a good way to work off the excess energy, but I wondered if the diminutive affect it has on anger is due more to the release of dopamine from the exercise which would helps our brains focus and think clearly and thus deal with the source of the anger more rationally. What do you think?