Leaving aside the fact that Indy just has far more sex appeal than Han (Nobody ever calls Indy a scruffy looking Nurfherder) lets look at the evidence. In the three Star Wars movies Han gets it on with just one person Leia. Yet in the three Indiana Jones movies (yes that's right three, there is no fourth movie as far as I am concerned) Indy gets it on with three people Marion, Willie and Elsa. And that is forgetting about the student with the message painted on her eyelids, who knows what happened there. I don't recall Chewie having any messages painted on his eyelids.