I guess some guys (and guys acting as girls) like to
share their experiences with other guys, from there, find new ideas
to "toy" with their GFs.
Nothing really wrong with that, it's behind a nickname
anyway.
And why would you want to poke/brush an electric toothbrush into
your sensitive areas?
And for that guy who says he uses a vibrator in the dorm, try
not to do it too often, the vibration can hurt yr wrist nerves.