An analytical mind is helpful for finding your way around labyrinthine complexities; also, navigating in semi-dark, small, confined spaces until late at night, exploring different avenues and generally checking out what's around the next corner means it only stands to reason that you're going to make a pretty darn good caver `cos if you can cope with all that computing malarkey you're bound to be able to cope with the underworld!
:shock:
But, hey!, it's a good question... you know something? I've been using computers since 1980 (when you had to build your own). Here's a question - does anyone who's into caving NOT work in I.T?