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, who was hanging out with Jennifer Aniston last year. Of course, the funny part is that Jen's new man John Mayer was rumored to be dating Cameron last Fall. The whole thing makes our heads hurt, but it's not the first time we've seen the stars swap partners. So tell us — are you surprised by Hollywood's incestuous relationships?