This is fake. They haven't been sat on that rock for 50 years. If you look closely
you can clearly see her swimsuit is different in the second photo, it has stripes
on it. And the guy's shorts seem to have a more floral pattern in the latter
photo.Also, if someone sat on a rock for 50 years, it would have made the news.
My theory is, they simply returned to the same location 50 years later, and
recreated the original photo.