<p>there's a definite, mutual rivalry between the two schools in men's basketball, and something <em>approaching</em> a mutual rivalry in football (although princeton hasn't beaten penn in years, the alumni stilll care). any other rivalry, to the extent that it exists, flows in one direction, from west philadelphia and across the delaware. speaking from the princeton side, there really isn't any <em>general</em> animosity at princeton toward penn or its students. you won't, for example, see any "puck fenn" tees.</p>