A quick thought: If you don’t want sensitive information/photos/etc. taken from you, don’t put that information up on the web (or keep it sitting on your smartphones). While so many tech companies will bend over backwards to tell you how safe your information is “in the cloud” and/or “on their servers”, the simple truth is, nothing is 100% safe if it is connected to the web.
So if you need to take racy photos of yourself or your significant other, and don’t want them to appear all over the net, use something old school like this; a Polaroid Camera!