Q&A for How to Manage Facebook Privacy Settings

If you log into their account you can. Maybe ask your family or close friends to log into their account and look at your profile.

No one can access your private messages without logging into your account. Don't share your login information with anyone else.

Keep your photos private. There are privacy settings that can be used if you do not want certain people seeing your profile. Change the privacy settings to "friends only" so that nobody except people you trust are able to see your content.

You won't be able to see anything unless you send them a friend request. Some people disable friend requests, so you can't ever see them at all.

First, consider whether you are comfortable with anyone seeing your photos and who the subjects are. Highly personal or sensitive photos should typically be restricted to friends or yourself. Reflect on specific individuals who might react negatively or misuse certain images, asking yourself if you would want them to see and share those photos. Remember that you can set individual privacy settings for each photo, rather than making your entire profile private.

The option to disable friend requests is varied. A user can choose to either only allow mutuals (friends of their friends) or allow anyone to send friend requests (regardless of their profile's visibility). So if you are not friends with any of that user's friends, you cannot send them a friend request.

They will stay forever unless you manually change the settings. Don't leave your account logged-in and open where someone can mess with it.