i Cloud Photo Library has more or less replaced My Photo Stream but it's still there for people who have been using it.
If you're one of them, and you're now concerned about just how much flesh tone or family business is included in those pics, you can shut it down too.
If they're treasured memories you'd be devasted to lose, then back them up. If they're just for fun and you'd be crushed if they ever got out, treat them as disposable.
Most of the modern messaging services are based on the model that you send your picture/text/video etc.It makes sure you'll still have your photos in the event you lose or break your i Phone but it also means there'll be copies on your computer, which is another place you'll have to protect.At the end of the day, decide how important having the photos are to you.This is link to a post in which I have discussed the legality of sharing nude pictures over Whats App.You don't have to be a celebrity to be concerned about your privacy.