Sad answer for the question "Who dumbed whom? in Jennifer Aniston " John Mayer relationship. We recently wondered who's fault was for their brake up and we had two opposite versions: one telling it was Jen's fault and the other saying it was John's fault. But now that we have the answer, it seems that we didn't have all the information back then.According to new sources, mostly close friends of the couple, the reason was John's...