Well what a bot might deem as duplicate content.

On my adult site I have galleries, many of the same person, I checked the 2 galleries of the same person on a 'similiar page checker' tool and they always come up above 90% similiar content, and even ones that are of different people are above 60%.

My question this, how can I avoid this when gallery pages of the same person will always be similiar as there isnt much text to put on a gallery page, same goes for ones of different people, only the images are really different.