Dopamine is the compulsion chemical, not the pleasure chemical. It turns thoughts into beliefs into actions. This is why people who take too many dopamine recreational drugs who get leaky dopaminE vesicles tend to easily believe any thought that occurs to them and do all kinds of psychotic things. A Scanner Darkly by Philip K. Dick had some great portrayals of what this looks like.
Opioid are the pleasure chemicals and that's why exogenous opioids destroy people. There's nothing that an opioid high can't fix, because that's literally how the brain is wired. Once the opioid receptors are activated, the brain is literally done trying to do anything else because the ultimate aim, at least the way the brain is wired, has been acheived.
If anyone is interested more in the latest science of teasing apart the neural substraits of wanting and liking I highly recommend taking a look at the review papers written over at Berridge lab, http://www.lsa.umich.edu/psych/research&labs/berridge/resear...
The new popular oversimplifications tend to be really patronizing to the previous ones
Is there some kind of war between The Verge and Business Insider? The article mentions 3 times that Business Insider mistakenly called dopamine the pleasure chemical just in the intro.
What’s the purpose of a distinct pleasure chemical and a “compulsion” chemical, evolutionarily? Wouldn’t a pleasurable response already compel you to repeat the action?
The quality of the article is horrifyingly low