Seems like a lot of sensors are artists or musicians, and in turn, many are part of counter-cultures through and/or in relation to that. And that would be one indicator of their openmindedness.

It could even apply to many of the sensors who are athletic or thrill/pleasure seeker types. Many are open to adventure, new activities, foods, sex positions!.. testing their limits in all kinds of ways.. etc.. It's a form of openmindedness