4. He Gets Laid
This one links back to reason number 2: with a face like that he's gonna get laid. Apart from his actual wife, we can almost be sure that in his down time (and when he's on expeditions) the man's getting all sorts of strange, probably picking up impressionable undergraduates around the university with such pick up lines as "I'm Indiana Jones" or "I have a whip". There's not much else to say about this one real archaeologists don't get laid.