Here is a little tip based on personal experience. If you are snooping around in someones phone, remember to check the media stored within messaging apps like Whatsapp, Viber..etc, not just the generic photo library
The beauty about Whatsapp is that the photos/videos sent not only automatically get stored to the phones photo library but they also get stored in a media folder within the app that is not overly obvious. I can almost guarantee, the majority of people think they are getting rid of the content by deleting it from their photo library as that is checked most option. You have to delete it from within the app separately to get rid of it from there.
A buddy of mine left his phone unlocked while having a shower and while his photo library was sfw, the whatsapp chat with his wife had full nudes of both of them, His wife looked great but I saw waay more of him than I wanted to haha
Other chat apps like Viber are good to, I found a topless picture of a co-workers girlfriend simply but scrolling up in the message chat in that app within Viber.
Happy digging
