Music, especially playing music with others, is another addictive activity that probably involves some similar process, producing stuff in our blood stream or something that makes us feel good.

The trick is to find addictive things like that that do you good as well as making you feel good. My son feels that way about doing physical exercise, which is probably good for him. He'll stagger back from work looking tired and fed up, then he'll go out for a run and come back looking exhausted, but feeling great. It's never worked that way for me...