I made a Venn diagrampic.twitter.com/6j52IwF4AK
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
both spectrum and chart fits my mental model: https://www.psychologytoday.com/blog/face-your-fear/201001/altruism-heroics-and-extreme-altrusim …
biological penchants combined with social norms would suggest rare outliers in otherwise common behavior.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.