I, of course, was never so juvenile to try and use the baseball metaphor for sexual contact, even though Meatloaf was bringing it to everybody's attention about the time I was starting to actually round the bases. XKCD has a handy reference guide for you, although I think "Eye Contact From Janeane Garofalo" should be much, much closer to the Maginot Line than represented.

XKCD, a lovely comic known for its humor eclipsing its artistic quality by orders of billions, has tried to explain the numeric basis of sexual positions, using stick figures. Square root of eight, indeed.