I stumbled across four Thwack MVP's who shared a commonality: they all had graphite in their bodies, due to childhood accidents, carelessness, attacks by peers or siblings, etc.
Informally polling all the MVP's, I found only four did NOT have a pencil lead experience.
So that tells me it's not a pre-requisite for becoming an MVP. ;^)
When I Googled the topic I learned that it's a common issue.
Please select the choice below that best applies to your graphite / pencil-lead experiences. If you want to share the details of your adventure in the comments section, please do!