It's no secret that celebrities love dating each other, and these days it seems more like high school than ever. Apparently Cameron Diaz went on a date with model Paul Sculfor [1], who was hanging out with Jennifer Aniston [2] last year. Of course, the funny part is that Jen's new man John Mayer was rumored to be dating Cameron [3] last Fall. The whole thing makes our heads hurt, but it's not the first time we've seen the stars swap partners [4]. So tell us — are you surprised by Hollywood's incestuous relationships?