On the other hand, being able to have lots of sexual partners implies being able to convince lots of people you're worth having sex with (this is one of the two main goals which developed human intelligence in the first place, the other being killing people who were doing the first too effectively), and taking a lot of psychoactive drugs I think also implies a sort of mental fortitude (it's very difficult to habitually take strong psychedelics without having a solid grasp on reality and how to adjust your actions to account for the change in perspective, the people who can't do this but enjoy psychedelics anyway aren't who anyone is thinking of when they say intelligent people use psychedelics).
I listen to mostly metal, so you can trust what I say [https://www.theguardian.com/music/musicblog/2007/mar/21/whym...]
Not sure if it's scientifically correct, though.
Playing a sport, on a team involves so many dynamics that just don't exist when thinking in a classical intellectual sense whilst writing code, for example.
Living in a country for an extended period wherein the prevailing language and culture is not your own ... this can be really quite mind altering.
I think that the above correlation, pulled from the article maybe doesn't quite capture it. They basically state basically that 'novelty keeps you interested and motivated', I suspect there might be more than that.
Though obviously it's hard to discern since we don't really have a true model for brain functions and cognition.