Everybody loves Friends and there's no denying that Jennifer Aniston's character Rachel Green was an absolute boss. Incredible hair, amazing fashion and a transformation from rich daddy's girl to high-flying fashion buyer. If only she ditched that whiny Ross on the season finale and jetted out to Paris But there's one thing that's left fans puzzled about Rachel over the years and that's why her nipples made so many appearances. I mean, they were a bloody delight but she was basically the OG for the freethenipple movement. Fans have come up with their own theories.