Intelligence is correlated with experimentation and drug usage (and generally do-what-you-will with your body political attitudes).
Some discussion on the phenomenon here:
"We know that intelligent people have more self-control and make better decisions in general — they’re less likely to play the lottery, more likely to follow medical advice, less likely to die in accidents. As a consequence, they tend to flourish in an environment free of normative constraints. They may experiment with drugs without ever getting addicted. They may dabble in polyamory without wrecking their marriage. They may coast on their achieved identity, dismissing traditions as stifling or unnecessary."
- via: https://www.aporiamagazine.com/p/why-are-intelligent-people-...
