Looking at this remarkably thorough STD-esque flowchart, you can reasonably conclude that Mayer's dick has been everywhere, from Jessica and Jen to Soleil Moon Frye and Fred Savage. Impressive. Click to enlarge and marvel. [GQ]
That reminds me of hearing that Truman Capote used to play a game called International Daisy Chain, where you would link celebrities through sexual relationships. He would call Mercedes De Acosta his trump card b/c you "could get to anyone from Cardinal Spellman to the Duchess of Windsor."
John Mayer is no Mercedes De Acosta but he certainly is very well connected.