So a quick recap: 1st base (kiss), 2nd base (?), 3rd base (???), and home run (XxX).
And more than likely, I would have lived out the remainder of my life never truly understanding what 2nd or 3rd base was, had I not stumbled onto this from xkcd.com...
While somewhat explicit, the bases are clearly defined and quantified.
NOTE: Just like you've always heard, never Share Your Root Password with someone you don't love. When they have your Root Password, they really have a piece of you.